GEN11 AND GEN12 COMPATIBILITY: Designed for HPE ProLiant DL385 Gen11 and DL340 Gen12 server models MOUNTING DEPTH RANGE: 4-post adjustable depth of 1239.5 in; 2-post center mount depth of 36 in UNIVERSAL RACK FIT: Installs in 19 in EIA-310 compliant 2-post and 4-post racks; no OEM rails needed SERVICEABLE DRY SLIDE DESIGN: Smooth dry slide rails enable easy equipment access without ball-bearing wear ROBUST CONSTRUCTION: Compatible with L, C, and ? upright shapes; fits square, round, and threaded rack holes