Aone tech IWS professional server has 19 inch 42U rack mounting support, ideal solution for mounting networking and telecom equipment in a wide variety of applications / data centers, ships completely assembled to increase speedy installment, UL-2416 listed compliance for loading / bonding / and safety, supports up to a 3,000 lbs, 19-inch EIA mounting rails provide adjustments in 0.25in increments, vertical RU and front-to-back spacing indicators which simplify alignment and mounting while the two-piece lockable side panels simplify panel handling and access to equipment.