ADJUSTABLE DEPTH: Adjustable top & bottom frame can be moved forward or backward to adjust the mounting depth from 24 to 38 (60cm to 95cm) 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 4 post open frame server rack features 3 load-bearing casters which can withstand static load 1200lbs, and leveling feet supporting up to 1700lbs