The PTRK-RR27 Rear Rack Rail for 27U PTRK Series Racks from Middle Atlantic is a rear rack rail kit designed for use with PTRK series racks. This pair of 11-gauge steel rack rails features tapped 10-32 holes with universal EIA spacing and numbered rack spaces. Threads are coated with a special non-clogging "e-coat." This model is designed to work in 27U racks. • Rack Rails for PTRK Series Racks This rear rack rail kit is designed for use with PTRK series racks. • Solid Construction This 11-gauge rack rail is made from steel and features tapped 10-32 holes with universal EIA spacing and numbered rack spaces.