Wall mounting non-rackmount components is much easier with Middle Atlantic's WMS-20 wall mount shelf. Featuring a fully welded design using 16-gauge steel, the unit's 200 lb. capacity gives it unrivaled strength in its class. With a vented bottom to help keep things cool, both 1/2" and 3/4" electrical knockouts are provided for your convenience. Dimensions: 20-1/2" W x 17" D x 14" T.