Case D DC DI DO Tractor Brake Kit. This kit is for some tractors prior to serial # 5600000. Kit includes 2 linings & 18 rivits. Does 1 Disc. Linings measure 8″ OD, 5″ ID. Be sure to measure your old linings. This is a quality U.S. made kit at an economical price. Search our store for other brake kits and parts, or give us a call.