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Product Info

Humanscale DE400 & DE450 Corner Sleeve

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    humanscale 10% promo

    Desk spreading is here to stay. The Humanscale DE400 & DE450 Corner Sleeve is an ideal way to increase desktop real estate instantly.

    By changing your 90° corner into a diagonal work surface, you can mount your keyboard and move your mouse to the best positions for your work style, improving office ergonomics in the process.


    • DE400 fits desks 1" to 1 1/2" thick
    • DE450 fits desks 1 1/2" to 2 1/2" thick
    • Dimensions: 38 1/2" x 13 3/4"
    • Compatible with Humanscale keyboard tray or mouse platforms


    DE400 Fits desks 1" to 1/2" thick
    DE450 Fits desks 1 1/2" to 2 1/2" thick
    Dimensions 38 1/2" x 13 3/4"

    Humanscale Corner Sleeve


    The two models have the same width and length, but are made to fit desks of different thicknesses.

    • DE400: Fits desks 1" to 1.5" thick
    • DE450: Fits desks 1.5" to 2.5" thick

    Product Reviews

    Write Review

    1. Problem solver 5 Star Review

      Posted by on May 16th 2014

      Extended my desk area perfectly

    2. DE 450 Corner Sleeve 5 Star Review

      Posted by on Aug 21st 2013

      I believe this is the best corner sleeve on the market. It is a little pricey, but I think it is worth the extra. Large size helps it cove worksurface joints easily.

    3. Simple and effective 5 Star Review

      Posted by on Aug 18th 2010

      This simple device extends the cube surface without all the knobs and levers that are always slipping on the "ergonomic" keyboard trays.

    Warranty Information

    This product comes standard with a 15-year warranty.

    Return Information

    • Return windows close 30 days after you receive your item.
    • You are responsible for obtaining a Return Merchandise Authorization, the cost of shipping, and potential restocking fees, if the item has been opened.
    • To start a return, or to view the full returns policy, click here.
    Your Cost $159.00 List Price: $225.00
    Ships Free (US48)
    Ships the same business day

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    Bulk Deals

    In many cases, we can offer bulk quantity discounts for purchases or smaller orders made over an extended period of time. Bulk deals are based on anticipated volume and the products you've selected. We can also provide you with brochures and swatches to assist in your purchasing decisions.

    If you would like to request a quote, we can be reached via phone (800-531-3746), email (, or live chat from 8am - 7pm Monday - Friday and from 10am - 6pm Saturday.

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