The VX1410A or VX1411A option 1R or 2R comes with a General Devices CTS124 Chassis Trak that contains a standard hardware package. The package includes all the hardware necessary to mount the Chassis Trak slides: Rear mounting brackets (B-814-2) Bar nuts (CA8056-01-0019) # 10-32 X .50 F.H.M.S. (flush front rail mounting) # 10-32 X .50 B.H.M.S. # 10-32 X KEPS nuts When mounting the CTS124 Chassis Trak in equipment racks that are deeper than 24 inches, you must use General Devices Optional Mounting Brackets: 20 extensions; B-131 ( supplied with standard CTS124; 0.50 inch ) up to B-131-11 ( 10.06 inch ), or B-307-2 Wrap-Around Bracket for rear mounting bracket extension ( from 0.56" to 8.69" in 0.63" increments ). These parts are available only from General Devices Sales Service (317) 897-7009.