https://www.studebakerparts.com/studebakerparts/store/s/agora.cgi?product=brk3
BRK924 WHEEL CYLINDER
BRK924, 681068 1 3/8 REAR WHEEL CYLINDER FOR 2R-14-17,3R-E 16,17,28,38, 3E-6E 16,28, 7E-8E 25,28,35 THESE ARE FOR TRUCKS USING TWO 1 3/8 WHEEL CYLINDERS P
wheelcylinder