Universal size: the outer diameter of the cable roll for the gym is 90mm, the inner diameter of the hole is 10mm, the groove depth is 10.8mm and the groove width is 10.2 mm. The pulley's universal size fits most fitness equipment and its unique advantages are gradually replacing the old metal pulley Premium Material: Our black fitness pulley is made of premium nylon, lightweight and sturdy, wear-resistant and impact-resistant, abrasion-resistant, low noise, etc. In addition, the built-in bearing of the pulley is made of high quality carbon steel, which is strong and durable. Long , you can use and buy with confidence Large load capacity: the fitness pulley has a built-in bearing and a high load capacity of up to 1000 kg. So you don't have to worry about its load capacity, it is often used in various lifting devices as an accessory for tower cranes Worry-free use Our universal bearing rollers fit most fitness equipment and are therefore ideal for damaged rollers. It is very easy to install and use, just remove the damaged pulley and roll it by our pulley to get a more durable fitness machine Convenient round pulleys - Our universal rolling rollers are suitable for fitness machines. pulley fitness, garage door roller systems, cable machines, wire ropes and other parts. It has a wide range of applications and connt both indoors and outdoors