THESE ARE 6 FOOT DIAMETER SHEAVES USED IN MINES, ON CRANES, BARGES, LIFTS, PILE DRIVERS AND OTHER INDUSTRIAL EQUIPMENT. THEY INCLUDE PILLOW BLOCKS FOR SHAFT MOUNTING. SHEAVES AND PILLOW BLOCKS ARE CORED FOR .032 WIRE (OUR PART 1105).MOLDED IN GRAY STYRENE.2 SHEAVES, 4 PILLOW BLOCKS