3U rack tray for conveniently mounting your Sealevel I/O products. Perfect for SeaI/O modules, Ethernet serial servers, and USB SeaLINK® devices. Adjustable clamp, Item# RK-CLAMP, is available to hold equipment firmly in place. The tray is standard 19 inches wide, 3U (5.25 inches) tall, and 14.5 inches deep. The rack tray mounts using existing rack mounting hardware supplied with the rack.