ErgoQuest™ CPU Holder (EQ-CPUH-1) is  onstructed of rust-proof, powder-coated steel, the brackets adjust to fit virtually any size tower case or can be used to conveniently mount a desktop case on it's side. Anti-scuff, anti-skid foam pads are included to protect the computer case and prevent it from sliding out of the bracket.  Screws securely to desk, arm can be raised or lowered, accommodates different size cases, no additional tools required to assemble, adjusts to fit cases from 5 1/4" to 9 1/4" inches wide and from 15 3/8" to 21 inches high.  Black metal finish.