Mountain Mods ALU Triple 120 (Black Anodized) 5.25 baycover Mountain Mods Aluminum Triple 120 5.25 bay cover These covers are made from 1 mm aluminum with an anodized. 8 threaded inserts allow for fastening in a drive bay using standard 6-32 pc screws. The Triple 120 5.25 bay cover incorporates a single 120mm fan blowhole with 4 mounting holes for mounting a 120mm fan inside.