90mm Standard Size for Wide Compatibility: Fits various gym machines including cable stations, power racks, and trainers, making replacements easy for upgrades or maintenance U Shaped Cable Guide: The refined U shaped channel securely directs cables while reducing wear, helping preserve your workout equipment Smooth Bearing Function: Built in sealed metal bearings secure consistent cable motion without sticking, providing stable resistance for effective muscle activation and joint friendly training Sturdy Aluminum Construction: Made from robust aluminum alloy for increased strength and durability, these pulleys handle intense workouts without warping or breaking, outperforming alternatives for long term gym use Quiet Sealed Bearing Design: Features reducing sealed bearings to minimize squeaks and friction sounds, ideal for home gyms, garages, or shared exercise areas, Manufacturer: Xjdzineq