Smartrack Heavy Duty Fixed Shelf. Material: Cold-rolled steel. Dimensions: 1.73"(H) x 19"(W) x 26.1"(D). Maximum weight capacity: 250 lbs. Black. Designed for 4 post rack mounting. Accommodates tower units, monitors, and other equipment. Includes shelf and mounting hardware. Weight: 16.5 lbs. Warranty: 5 years limited. Operating temperature: 32 - 104 deg F. Operating humidity range: 10 - 90%, relative, non-condensing.