Mounts up to 3 desktop style power supplies. Wiring may be routed out the sides and rear of the chassis. The RC-HPS3 is compatible with all RDL desktop power supplies and with any desktop power supply with maximum dimensions: 5.8ƒ??, 14.7 cm x 3ƒ??, 7.6 cm x 1.7ƒ??, 4.3 cm This adapter fits 10.4" racks.