Premium Quality ;- This 100% brand new bearing pulley wheel is made of high quality nylon material, doesn?t break down the cable coating like metal pulleys do,which is durable, wear resistant and waterproof. It is not easy to break, has reliable quality and long service life. High Safety Performance and Stability The 115mm bearing pulley wheel is a great accessory of fitness equipment.When using the 115mm bearing pulley wheel, there will be no friction spark, and it has a high safety performance and stability, which ensures easy movement. Wide Applications The nylon bearing pulley wheel is very practical, which is suitable for most fitness equipment, gyms, home gyms, commercial or person use. Lightweight & Easy to Install : Nylon pulley is light weight, easy to install at high altitude. Operating Advantages: The smooth surface provides a smoother feel, ensures easy movement and increases exercise fun, practical and durable.