Features: brand new and high quality One-way pulley, static tension 25 KN (about 2500kg,2.5 Ton), rolling tension 12.5 KN(about 1250kg,1.25 Ton), Fit the rope Diameter 8-12 mm. Concave pulley, surface polishing, use smooth. Made of high strength aluminum alloy, anti-corrosion. Strong load-bearing ability, will not break. Our rope pulleys are widely used, for example, in modern furniture, on your boat or in the garden. Specifications: Material: High Strength Aluminum Alloy Size: 20x10 for cm/7.87x3.93inch Color:As Picture Shows Package Includes: 1 x Pulley note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you place order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!