Featuring fully ventilated bottom and sides for heat dissipation, the fully-welded, easy-to-install U2V-4 Pack of 4 3-1/2" Vented Universal Rack Shelf from Middle Atlantic fits all components up to 17 3/8" wide to quickly meet all of your rack mounting needs. This shelf is made from 16-gauge steel, with each unit individually boxed. Also, it includes 3 rear brackets to prevent components from sliding backwards.
The U2V-4 helps to save valuable space by accepting the mounting of the 8 outlets and 15A power strip PD-815SC-PBSH (sold separately) on the rear of the shelf (requires 2 1/4" deep by 18 3/4" wide open space behind the shelf). It also allows the attachment of optional clamping bars to secure components.