Feature:1. Wheel Diameter: Nylon pulley wheel is simple and practical. The bearing diameter is 90mm / 3.5in and the inner hole diameter is 1cm / 0.4in.2. Durable: Gym pulley wheel is made of premium nylon and metal 6203RS bearing, strong and durable, not easy to damage.3. Silent: Nylon bearing pulley wheel preserves grease, which can prevent impurities from entering. Noiseless and glossy.4. Applicable Scenarios: Nylon pulley whee can be used for garage door pulley system, DIY home projects, fitness equipment, clotheslines, cranes, lift tables, ladder lifts, store lifts.5. Package: Nylon bearing pulley wheel comes in a pack of 10 in black. The quantity is large enough to meet your usage needs.Specification:Item Type: Nylon Gym PulleyMaterial: Nylon, IronPulley Diameter: Approx. 90mm / 3.5inPulley Middle Aperture: Approx. 1cm / 0.4inProduct Color: BlackApplicable To: Pulley.Package List:10 x PulleyNote:1. Manual measurement, please allow slight error.2. Due to differences between different monitors, the picture may not reflect the actual color of the item as well.