The TS-x80 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:1. Rack sizeA. Mounting post width: ≥ 451mm.B . Panel width: ≥ 500mm.C. Mounting post depth: 650mm~850mm.2. The optional rack kits for the TS-x80 rack mount models are only compatible with square-hole server racks.