SKU: 10780031055

MDF Radius Corners, L Corner (accepts 3/4" plywood), 4" Radius, 5 11/16"W x 1 7/8"D x 97"L

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Description

MDF Radius Corners, L Corner (accepts 3/4" plywood), 4" Radius, 5 11/16"W x 1 7/8"D x 97"LWhite River Hardwoods MDF Radius Corners Made in the USA 4 L Corner SKU 4L34 Accepts 3 4 Plywood 4 Radius 97 Length Double Refined MDF 5 11 16W 1 7 8D Ships LTL The 4 L Corner for 3 4 plywood the most widely specified L Corner profile in the lineup. The two leg L Corner geometry integrates cleanly with standard cabinet box construction. Double Refined MDF, made in Fayetteville, AR. Made in Fayetteville, AR The Only National MDF Radius Corner

White River Hardwoods · MDF Radius Corners · Made in the USA

4″ L Corner

SKU 4L34 · Accepts 3/4″ Plywood · 4″ Radius · 97″ Length

Double Refined MDF · 5 11/16″W × 1 7/8″D · Ships LTL


The 4″ L Corner for 3/4″ plywood — the most widely specified L Corner profile in the lineup. The two-leg L Corner geometry integrates cleanly with standard cabinet box construction. Double Refined MDF, made in Fayetteville, AR.

Made in Fayetteville, AR · The Only National MDF Radius Corner Manufacturer in the USA

The 4″ L Corner is the most widely specified radius corner for standard cabinet construction — the right radius, the right geometry, every time.

Product Details

Dimensions & Specifications

SKU Profile Radius Accepts Width Depth Length
4L34 L Corner 4″ Radius 3/4″ plywood 5 11/16″ 1 7/8″ 97″

* Material: Double Refined MDF. Lead time: 7–10 business days. Ships LTL — minimum $45 freight. Street address required for delivery.

Why MDF Radius Corners

The Problem This Solves

⌒

L Corner — 4″ Radius

The L Corner profile at 4″ radius is the workhorse of the radius corner lineup. The two-leg geometry integrates with both the front face and the side panel of the cabinet box — a cleaner, more complete corner solution than the Econo Quarter Round for full-height cabinetry and built-ins.

▣

Double Refined MDF

Double Refined MDF machines cleanly, paints to a flawless finish, and holds its shape over time. No grain inconsistency, no void risk — just a consistent, dense substrate that takes primer and paint the way cabinetry demands. A surface indistinguishable from solid wood when properly primed and painted.

★

Only National Manufacturer

White River Hardwoods is the only national manufacturer of MDF radius corners in the USA — made in Fayetteville, AR. Consistent quality, reliable availability, and a supplier that has been delivering to the cabinetry industry nationally for decades.

⊞

Accepts 3/4″ Plywood

Engineered specifically for 3/4″ plywood box construction — the standard substrate for this profile. The plywood box butts cleanly into the radius corner without shimming, scribing, or custom fitting. One piece, right the first time.

Technical Specifications

Key Facts

Profile

L Corner

Radius

4″

Accepts

3/4″ Plywood

Width

5 11/16″

Depth

1 7/8″

Length

97″

Material

Double Refined MDF

Lead Time

7–10 Business Days

Made In

Fayetteville, AR

Installation

Working With Radius Corners

1

Plan Your Layout

Determine the location and orientation of each radius corner. The piece is 97″ long — cut to your finished height. Mark cut lines accurately before cutting; MDF does not forgive mis-cuts at visible faces.

2

Cut to Height

Cut with a fine-tooth carbide blade — MDF dulls blades quickly. Cut from the finish face to minimize tear-out. Support the full length when cutting to prevent binding and chipping at the cut line.

3

Dry Fit First

The 3/4″ plywood box should seat cleanly into the radius channel. Dry fit before applying any fasteners or adhesive — confirm seating depth and check that the radius face is flush with adjacent cabinet faces.

4

Fasten & Secure

Secure with construction adhesive and finish nails or screws through the cabinet box. Pre-drill to avoid splitting. Set fasteners slightly below the surface — MDF fills cleanly and holds fasteners well when properly pre-drilled.

5

Fill & Prime

Fill all nail holes and seams with lightweight filler. Sand flush when dry. Apply a quality MDF primer before finish coats — MDF is highly absorbent and requires a sealing primer coat for a smooth, paint-ready surface.

6

Finish to Match

Apply your chosen paint in thin, even coats over the primed surface. Two finish coats over primer is standard for a smooth painted cabinet finish. Sand lightly between coats with 220-grit.

Always Prime MDF Before Finishing

MDF is highly absorbent at cut edges and faces. A quality MDF-specific or high-build primer is essential before any finish coat. A properly primed MDF radius corner paints to a finish indistinguishable from solid wood — skipping the primer step results in an uneven surface that requires significant additional work to correct.

Shipping — LTL Freight

MDF Radius Corners ship via LTL freight. Freight is calculated by destination with a minimum charge of $45. If actual freight exceeds $45, a separate freight invoice will be emailed after your order is placed.

Important: LTL delivery requires a physical street address. We are unable to deliver to APO/FPO addresses or PO Boxes. Estimated lead time is 7–10 business days from order confirmation, subject to inventory availability.

4L34 — 4″ L Corner, 3/4″ Plywood. The most widely specified radius corner profile we make.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 10780031055

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4.2 ★★★★★
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Product Reviews
T
The Southwest Grasshopper
Phoenix, US
★★★★★ 5
Good replacement parts and affordable
I acquired this filter set to replace the OEM filters in my wife's Honda Accord. The filters fit perfect and were easy to install. Normally when I replace filters I have to purchase both the air filter and the cabin filter separately. In this case, it was very nice to have them sold as a combo set. While I don't know what materials are used to manufacture these filters, I will say that the air filter looks just like the OEM part in terms of it's production. The cabin filter does have carbon built in to help control orders, which is something the OEM part did  not have, so it looks different in terms of filter color. I normally replace filters every 10K to 15K miles, and this fits in line with that this manufacturer suggests (every 12K miles).  In all, a decent combo set of filters helps keep costs down and both filters can be replaced at the same time. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 6, 2025
K
K Alex
Charlottesville, US
★★★★★ 5
Perfect!!!
This is exactly what I needed. Fits perfectly for my 2018 Honda Accord as well as being very easy to install. This is coming from someone who has no idea about doing anything on my car. Provides the best function, just as it would coming from a dealer or other auto shop. The quality is great as well, and this is exceptional value for the money. If you are looking to save money and not get bombarded with the filter replacement question when getting an oil change then this is the one for you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 4, 2025
T
T. Isaacson
Pawtucket, US
★★★★★ 5
Fit is good.
Filters fit and look essentially the same as the filters I’ve purchased and the official types from the dealer. I live in an area where wildfires occur almost every year,  so it’s good to have an extra set of filters to change them out after a run of smoky days. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2025
C
Charles
Birmingham, US
★★★★★ 5
Priced affordable, easy installation, fits snug and perfect and seems durable!!
This cabin air filter and engine air filter seems to be made of high quality materials, installation was a breeze, fitment seems to be perfectly snug affordably priced for a cabin air filter and an engine air filter combined, as for functionality, Only time will tell on its durability.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 2, 2025
A
Verified Purchase
AK
Carnegie, US
★★★★★ 5
cabin air for 4th gen runner
fit perfectly in my 4th gen runner, mine was original if you can believe it, (2003) and needed HELP.. dont think just click the purchase button and enjoy fresh breathable air again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026

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