Made of high-quality stainless steel, super wear-resistant, strong and durable. Suitable for 3mm-10mm wire rope, climbing rope, or twine. Mute pulley operates quietly, smooth and effortless operation. Can be mounted on wood, walls, and metal surfaces. Each pulley comes with 4 self-tapping screws and 4 yellow expansion sleeves. Ideal for home fitness and outdoor applications. Can be used as a shoulder or arm exercise fitness equipment component. Type: U-Type Single Wheel Pulley Block Overall Height: 60mm Overall Base Size: 68x30mm U-Type Groove Depth: 6mm U-Type Groove Inner Width: 16mm, Outer Width: 22mm Wheel Diameter: 48mm Note: The pulley has a maximum load capacity of 800 pounds depending on mounting material and angle. When installed vertically in wood, the load capacity is approximately 200 pounds. Maximum 800-pound capacity achieved at a 45-degree angle on concrete wall. Color: Silver Material: Stainless Steel Package Included: 2 x U-Type Single Wheel Pulley Block Content limited to items listed above; other products not included. Note: Lighting and display differences may cause slight variations in color between the image and actual item. Measurement error allowance is +/- 1-3cm.