Rear axle bearing cup. #15520. For Columbia/HD G&E 1963-77. For E-Z-GO some pre 1978. Cross Reference Part #''s BRG CHD 3703 ;83100-63 CO;808071 CU;50542G1 EZ;50542-G1 EZ;83100-63 IMC;300363 (SET) ME;10827 NR