... Dia.(mm)Bore. Dia(mm)Hollow Dia.(mm)Weight(kg)WRRH-3073017833011488.933.321WRRH-30103025843111488.933.327WRRH-6036089247159123.953.828WRRH-60660166323159123 ... -10010100257460212165.179.2106WRRH-1508150203349247190.579.2111 Double-acting,hollow Jacks WRRH series