Custom $280 Gallery Framing—In 12 Minutes.
Give your stretched oil painting, fine-art print, or wedding canvas an instant museum upgrade without the $280 custom frame shop.
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Every dimension of the Cosari MiterFloat L-38 is machined to eliminate the warped rails, split corners, and brassy plastic finishes of ordinary DIY frames.
Each aluminum L-rail is CNC-machined at an exact 45.0° angle and drawn tight by dual-screw internal steel corner plates—passing our 0.05mm feeler-gauge backlight test with zero gap.
The interior L-shelf suspends your stretched canvas 6mm away from the outer metal wall, hiding unpainted canvas staples and creating a floating gallery shadow line around all four edges.
At barely 9.5mm wide from the front with a deep 1.5-inch (38mm) side return, the brushed metallic border adds crisp architectural authority without overpowering delicate brushwork.
Choose from muted linear-brushed Titanium Gold, Light Gold, Purple Gold bronze, Matte Black, Brushed Silver, Frosted White, or tactile Black Walnut wood-grain on solid aluminum.
Your stretched canvas rests directly on the flat horizontal aluminum base shelf. The built-in geometry automatically creates a uniform 1/4-inch (6mm) dark floating shadow gap around the perimeter while presenting a razor-slim 3/8-inch brushed bezel from the front—with zero glass glare over your artwork.
Instead of weak glue or visible outer brackets, heavy-duty steel L-plates slide inside the extruded rear track of the 45-degree mitered rails. Tightening the rear set-screws pulls both aluminum extrusions together into a rigid, dead-flat 90.0-degree corner.
Slip two folded cardboard shims into the front gap to hold your exact 1/4-inch spacing, then drive the included self-tapping wood screws up through the recessed rear mounting groove into your wooden canvas stretcher bars. Every screw head stays 100% hidden.
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Architectural Extruded 6063-T5 Aluminum L-Profile · 3/8" Slim Bezel · 1/4" Museum Shadow Gap · Fits 1.25"–1.5" Deep Stretched Canvases
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$79.99 $159.99 Free Tracked Shipping (5–7 Days) Included
In Stock: Delivers in 5–7 Business Days. Free insured US delivery with tracking.
30-Day Money-Back Guarantee plus a full 2-Year Warranty.
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Architectural Specifications & Profile Dimensions: Crafted from 6063-T5 architectural extruded aluminum. Front bezel width: 3/8 inch (9.5mm). Side return depth: 1.5 inches (38mm). Built-in floating shadow gap: 1/4 inch (6mm) on all four sides. Compatible with stretched wooden canvas bars from 0.75" to 1.5" deep.
How to Measure Your Canvas Correctly: Measure the exact outer width and height of your stretched canvas with a tape measure. Select that exact size from the menu—do NOT add extra inches for the floating gap. Our CNC-mitered rails automatically add 1/2 inch of interior clearance (1/4 inch per side) so your canvas floats perfectly.
12-Minute Rug Assembly & Pro Shim Tip: Lay the four mitered aluminum rails face-down on a rug, connect three corners using the rear steel channel brackets, slide or drop your canvas in, lock the fourth corner, and tuck folded cardboard shims into the 1/4-inch gap while driving the rear screws into your wooden stretcher bars with a #2 Phillips screwdriver.
Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.
30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.
2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.
Pre-machined rear channels and self-tapping wood screws mean you only need one household Phillips screwdriver on your dining room rug.
Linear-brushed metallic anodizing and realistic Black Walnut wood-grain aluminum never look like brassy paint or cheap laminate.
Beat the $280 custom framing counter monopoly and frame an entire 3-piece triptych or staircase gallery wall for less than one boutique quote.
Cosari MiterFloat L-38Standard Competitors
| Feature | Cosari MiterFloat L-38 | Standard Competitors |
|---|---|---|
| Corner Miter Joint Tolerance | 0.0mm light gap (CNC 45.0° aluminum + steel rear channel lock) | 1mm–2mm visible gaps or uneven corner steps |
| Rail Straightness on 30"+ Runs | Dead-flat 6063-T5 extruded aluminum (0.0mm warp) | Wood & MDF rails bow outward under room humidity |
| Front Bezel & Shadow Gap | Razor-slim 3/8" brushed face + uniform 1/4" shadow gap | Bulky 3/4" painted wood lip that crowds the artwork |
| Canvas Attachment Method | Hidden recessed rear groove + wood stretcher screws | Weak Velcro adhesive strips or visible front brackets |
| Price & Turnaround Time | $79.99 (50% Off Today) · 12 mins on your rug | $240–$310 at custom frame shops · 3-week wait |
Swipe left for steps 2 and 3
Slide the steel corner brackets into the rear channels of the four extruded aluminum L-rails on your rug and tighten with a Phillips screwdriver until the 45° miters pull dead flush.
Set your stretched canvas face-up into the L-frame, center the 1/4-inch shadow gap using two folded cardboard shims, and drive the included screws through the recessed rear groove into your wooden stretcher bars.
Lift your framed artwork onto the included wall hooks. The whisper-thin 3/8-inch brushed bezel and 1/4-inch floating shadow gap give your room instant gallery authority.
Our local frame shop quoted $280 for a simple 24x36 metal floater, so I tried this instead. Once it's on the wall, I honestly can't tell the difference. The brushed Matte Black looks clean and the corners came together tight with no light showing through.
I bought Titanium Gold for an oil painting I finished last month. I was afraid it would be bright yellow, but the brushed finish is warm and muted. It took me about ten minutes to assemble with a Phillips screwdriver.
I stretch my own canvases and have had wood floater frames arrive slightly warped on runs over 30 inches. These aluminum rails stayed straight, and I got a crisp quarter-inch shadow gap all the way around.
I ordered three Brushed Silver frames for photography prints mounted on stretcher bars. All the mitered corners met square, and the brackets slid into the rear channels smoothly. Usually at least one corner gives me trouble on frames I assemble myself.
The Black Walnut finish surprised me. The frame is lightweight, rigid aluminum, but the textured grain looks like stained wood until you tap it. It's just the look we wanted in our living room without using a wood frame.
I used Purple Gold around a moody floral canvas in our dining room. In regular room light it looks like a deep antique bronze or espresso metallic. It makes an inexpensive gallery-wrapped print look much more finished.
Each rail was wrapped separately with foam corner blocks, so nothing arrived scratched. My 1.5-inch-deep stretched canvas fit nicely. I used folded cardboard as temporary shims to center it while screwing it in from the back, and it looks great.
The Frosted White is lovely around my bright coastal painting. The front edge is barely 3/8 inch wide, so it gives the art a clean border without taking over. The metal feels nice and stiff too.
We chose Light Gold for our wedding portrait on canvas. My husband and I aren't particularly handy, but we assembled it on the dining room rug in about 15 minutes. You can't see the hardware from the front because it's tucked into the recessed groove.
I've bought about six of these over the past year for our staircase. Mixing Matte Black and Brushed Silver works because the slim aluminum profile is the same on both. Our pretty mismatched collection of art finally looks like it belongs together.
$79.99 $159.99 Free Tracked Shipping (5–7 Days) Included
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Always order the exact width and height of your stretched canvas (for example, if your canvas measures 24×36 inches, select 24×36). The interior L-channel is already oversized by 1/2 inch total to automatically create a crisp 1/4-inch (6mm) floating shadow gap on all four sides.
The L-38 extrusion has a 1.5-inch (38mm) total side depth and a 1.25-to-1.5-inch cradle capacity, making it ideal for standard 1.25-inch and 1.5-inch gallery-wrapped stretched canvases. Thinner 0.75-inch canvases can also be mounted directly to the base shelf for a deeper recessed shadow effect, or raised flush using small wood/cardboard spacers.
No. Authentic canvas floater frames are open-front architectural L-profiles. Leaving the front open prevents glass glare over canvas weave and allows textured oil or acrylic brushwork to breathe naturally while protecting the outer perimeter edges.
Your canvas sets into the front L-cradle and is secured from behind. You drive the included countersunk wood screws upward through the recessed rear mounting groove directly into your wooden canvas stretcher bars. Zero hardware is visible from the front or sides.
Yes. Each extruded 6063-T5 aluminum rail is CNC-mitered at an exact 45.0-degree angle and joined via dual-screw steel L-brackets that slide inside the rear structural track, drawing the seams together into a dead-flush 90.0-degree corner with zero light gap.
All you need is one standard #2 Phillips screwdriver and 10 to 15 minutes on a rug or table. Every order is backed by our 30-Day Custom Frame Shop Side-by-Side Guarantee—hang it on your wall, and if the corners show a hairline of light or you want a different finish, return or exchange it hassle-free.