Features:Designed for hanging weight things to lighten load.Using gravity and skating to lift.Durable, strong, reliable, waterproof, anti-rust, anti-high temperature, corrosion resistance.Specifications:Material: 304 stainless steelItem color: As the pictures showSize: M15Model: Runner Diameter: Wheel Width: Rotating Ring Width: Total Length: Max Load:M15: 15mm 6mm 11mm 60mm 35kgNote: The max load weight is a Theoretical value, we cannot guarantee the pulley can achieved the max load,but these pulleys were standard made.Hope you can understand!Package Included:1 x 304 stainless steel pulley .