ADJUSTABLE DEPTH: The 19 inch adjustable server rack can be moved forward or backward to adjust the mounting depth from 20 to 30 that accommodate a wide range of 19 standard networking devices BUILD TO LAST: All-rivet structural connection with sturdy 2.0mm thickness cold rolled steel, this heavy duty server rack features 3 load-bearing casters which can withstand static load 1700lbs, and leveling feet supporting up to 1200lbs