1、Aluminium alloy material, sturdy and high durability for long-term use. 2、Universal pulley wheel is designed for most gym equipment. 3、Light weight makes it easy to install even at high altitude. 4、Slippy finish has small friction to ensure easy movement. 5、Suitable for 10.5mm bore diameter, a great choice for you. Features: Aluminium alloy material, sturdy and high durability for long-term use. Universal pulley wheel is designed for most gym equipment. Light weight makes it easy to install even at high altitude. Slippy finish has small friction to ensure easy movement. Suitable for 10.5mm bore diameter, a great choice for you. Specifications: Item Type: Gym Pulley Wheel Material: Aluminium Alloy Optional Diameter: 90mm, 115mm 90mm: Outer Diameter: Approx. 90mm / 3.5inch Groove Depth: Approx. 8mm / 0.3inch Groove Width: Approx. 10mm / 0.4inch Bearing Thickness: Approx. 25mm / 1.0inch Thickness: Approx. 18mm / 0.7inch Bore Diameter: Approx. 10.5mm / 0.4inch 115mm: Outer Diameter: Approx. 115mm / 4.5inch Groove Depth: Approx. 11mm / 0.4inch Groove Width: Approx. 11mm / 0.4inch Bearing Thickness: Approx. 25mm / 1.0inch Thickness: Approx. 20.5mm / 0.8inch Bore Diameter: Approx. 10.5mm / 0.4inch Weight: Approx. 275-331g Package List: 1 * Gym Pulley Wheel