Perfect design: Using two carbon steel ball bearings, high strength and good stability. It can effectively reduce vibration, run smoothly and minimize noise. material: The V-groove pulley is made of steel, with a solid structure and high strength; the surface is galvanized and rust-proof to ensure durability and long service life; after being processed by a precision CNC lathe, the surface of the pulley is smoother. Pack of 10 Rope PulleysDimensions: 3.1 x 5.5 x 4 cm/1.22 x 2.16 x 1.57 inches, pulley diameter is 31 mm, load capacity 150 kg. This set contains 10 V-groove rollers, enough to support many ideas in your life. Easy to install: Each V-groove pulley is equipped with 4 positioning holes, which can easily fix the pulley with screws and prevent the rope from twisting. ball bearings ensure smooth rope operation. Wide range of applications: It can be widely used in automated production lines and the transformation of various general mechanical equipment. You can also DIY home fitness equipment, doors and curtains. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia