Aluminum Alloy MaterialFitness Bearing Pulley is made of aluminum alloy, durable and wear resistant, CNC processing technology ReplacementAluminum alloy roller skating is excellent replacement for fitness equipment accessories and easy to replace Universal FitmentUniversal Pulleys With Silent Bearing fit for most gym equipment, suitable for 10mm inner diameter, suitable for home gyms, commercial or person use Featurespulley wheel with inner hole diameter 10mm/0.4inch, and has small friction to ensure easy movement Easy to InstallGym Bearing Pulley Wheel is lightweight, and it is easy to install at high altitude Size Chart: 54mm Outer Diameter 54mm, Groove Depth 8mm, Groove Width 8mm, Thickness 25mm 70mm Outer Diameter 70mm, Groove Depth 7mm, Groove Width 7mm, Thickness 25mm 90mm Outer Diameter 90mm, Groove Depth 8mm, Groove Width 8mm, Thickness 25mm 110mm Outer Diameter 110mm, Groove Depth 10mm, Groove Width 10mm, Thickness 25mm 114mm Outer Diameter 114mm, Groove Depth 10mm, Groove Width 10mm, Thickness 25mm 120mm Outer Diameter 120mm, Groove Depth 10mm, Groove Width 10mm, Thickness 25mm 75mm Outer Diameter 75mm, Groove Depth 7mm, Groove Width 7mm, Thickness 25mm 105mm Outer Diameter 75mm, Groove Depth 10mm, Groove Width 10mm, Thickness 25mm Package Includes: 1 Fitness Bearing Pulley Note: Please allow slightly errors due to manual measurement and different monitors.