Features Designed for hanging weight things to lighten load. Using gravity and skating to lift. Rugged construction and shock‑resistant design make it extremely rugged. Durable, strong, reliable, waterproof, anti-rust, anti-high temperature, corrosion resistance The whole is made of high‑quality stainless steel material, which is higher in hardness than ordinary materials. The material has the characteristics of moisture resistance, acid and corrosion resistance, and rust resistance This Pulley Block is ergonomically designed. 360 degree rotation to prevent knotting of the rope and easy to use. The flexible pulley has heavy load capacity and is suitable for a variety of applications 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 steel Item color: As the pictures show Size: M15 Model:         Runner Diameter:      Wheel Width:       Rotating Ring Width:     Total Length:         Max Load: M15:                 15mm                       6mm                       11mm                      60mm                  35kg   Note: 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  Package List