These pulley wheels are made of iron material, crack and wear resistant, so can be used for a long time. The single pulley block has a strong load-bearing capacity, suitable for the ropes, cable, and more. Great to industry and household, commerce. Features -Color:Silver -Material:Iron -Size:6.00X3.30X2.10cm/2.36X1.30X0.83in - strong material: Made of high-strength iron material, this pulley is wear-resistant, with strong durability. - Precision designed: Pulley block is made with precision processing, smooth operation, and safer use. - High load-bearing capacity: Pulley block can bear heavy weight, meeting the needs of various heavy objects. - Wide application: Pulley block is suitable for use in various scenarios such as ceilings, curtains, and swimming pools. - Multi-functional: Pulley wheels are suitable for lifting, traction, and direction-changing in various scenarios. Package list: 10 x pulley wheels 4 x screws