The TS-x 80 rack mount models comply with ANSI/EIA-RS-310-D rack mounting standards. Before purchasing the server racks for these models, please make sure the server racks conform to the following criteria: Rack size Mounting post width: &8805; 450mm Panel width: &8805; 485mm Mounting post depth: 650mm~850mm The optional rack kits for the TS-x 80 rack mount models are only compatible with square-hole server racks