MDF Radius Corners, Econo Qtr Rnd (accepts 3/4" plywood), 3" Radius, 4 1/4"W x 1 3/8"D x 97"L
SKU: 16863718034

MDF Radius Corners, Econo Qtr Rnd (accepts 3/4" plywood), 3" Radius, 4 1/4"W x 1 3/8"D x 97"L

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Description

MDF Radius Corners, Econo Qtr Rnd (accepts 3/4" plywood), 3" Radius, 4 1/4"W x 1 3/8"D x 97"LWhite River Hardwoods MDF Radius Corners Made in the USA 3 Econo Quarter Round SKU 3ECQ34 Accepts 3 4 Plywood 3 Radius 97 Length Double Refined MDF 4 1 4W 1 3 8D Ships LTL A 3 radius Econo Quarter Round for 3 4 plywood box construction. The tighter radius suits narrower cabinet profiles where a 4 corner would extend too far. Double Refined MDF, made in the USA. Made in Fayetteville, AR The Only National MDF Radius Corner Manufacturer in the USA The 3

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

3″ Econo Quarter Round

SKU 3ECQ34 · Accepts 3/4″ Plywood · 3″ Radius · 97″ Length

Double Refined MDF · 4 1/4″W × 1 3/8″D · Ships LTL


A 3″ radius Econo Quarter Round for 3/4″ plywood box construction. The tighter radius suits narrower cabinet profiles where a 4″ corner would extend too far. Double Refined MDF, made in the USA.

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

The 3″ Econo Quarter Round for 3/4″ plywood — a tighter radius for narrower cabinet runs and compact furniture profiles.

Product Details

Dimensions & Specifications

SKU Profile Radius Accepts Width Depth Length
3ECQ34 Econo Quarter Round 3″ Radius 3/4″ plywood 4 1/4″ 1 3/8″ 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

⌒

Econo Quarter Round — 3″ Radius

The Econo Quarter Round profile at 3″ radius, engineered for 3/4″ plywood. The tighter 3″ radius is the right choice when the wider 4″ profile would overhang adjacent elements or conflict with hardware placement.

▣

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

Econo Quarter Round

Radius

3″

Accepts

3/4″ Plywood

Width

4 1/4″

Depth

1 3/8″

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.

3ECQ34 — 3″ Econo Quarter Round, 3/4″ Plywood. Precision radius corners made in the USA.


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: 16863718034

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4.4 ★★★★★
Based on 2274 reviews
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Verified Purchase
Elizabeth Cook
Birmingham, US
★★★★★ 2
Check your milk preference when buying this unit. Product Does not last
Color: White
I purchased this frother in mid Oct and less than 90 days later, it's no longer working. The wisk does not spin, and the element does not heat the milk. I am currently working with customer support on a refund / replacement, but so far not happy. I've been told it does not work with 2% organic milk and that I need to switch to whole milk, which will solve my issues. Not sure how whole milk will help with the heating element? This was not disclosed when I purchased the unit. If I had known my milk choice would impact the frother, I would have chosen another brand or product. I like the unit, it's compact, easy to clean, but it did not last.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
M
Verified Purchase
M. Miski
Belleville, US
★★★★★ 5
Easy to use, reliable machine
Color: White
Great product! I have a fully automated DeLonghi cappuccino/latte coffee machine. After 5 years of use, the machine's milk frothing function started to fail. I purchased this product to supplement/replace the milk frother on my DeLonghi automated coffee machine; it works great and produces copious milk froth with much less mess.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
S
Verified Purchase
Stephanie R.
San Leandro, US
★★★★★ 5
Best frother ever!
Color: White
This is the best frother ever! Works better than my expensive espresso machine frother. So easy and makes a large amount enough for 2 large cappuccinos.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 1
False advertising--it won't froth almond milk.
Color: White
Bought this because I am vegetarian and I've consumed Almond milk for the past 15 years. The profile on this product said it would froth all milks, including almond. It does not--it heats the almond milk but does not froth it. It did froth 2% cow's milk I served a visitor, but I won't use cow's milk. I missed the return date by 1 day, or it would have been returned this product for a full refund. If you want to froth plant/ nut milk, don't waste your $$$.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
G
Verified Purchase
Graeme L Low
Lowell, US
★★★★★ 5
substitute for an ineffective espresso machine steam wand
Color: White
On sale, this item was reasonably priced. It very effectively heats and froths milk in two or so minutes. Less milk enables a more intense froth. It easily cleans up with soap and hot water. It appears to be well- engineered. It proves to be an able companion to an espresso machine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026

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