Feature:1. Premium Material: A simple and practical roller pulley, 90mm in diameter, made of nylon and premium bearing, strong and durable.2. Professional Bearing: 90mm pulley wheel with premium plastic bearing to preserve grease and prevent impurities from entering.3. No Noise: Sturdy nylon bearing pulley, no noise, stable running, better wear resistance, suitable for most scenes and equipment.4. Multiple Applications: Can be used for home fitness and garage door pulley systems, DIY home projects, clotheslines, cranes, lift tables, ladder lifts, store lifts, etc.5. Easy To Use: Universal bearing cable pulley is light weight and easy to install at high altitude. Has a large working load to ensure safe and reliable use.Specification:Item Type: Bearing PulleyMaterial: Nylon, PlasticsPulley Diameter: Approx. 90mm / 3.5inPulley Middle Hole Diameter: Approx. 1cm / 0.4inProduct Color: BlackApplicable: Pulley.Package List:10 xBearing PulleyNote:1. Manual measurement, please allow 0.04‑0.12in error.2. Due to differences between different monitors, the pictures may not reflect the actual color of the item.