Feature: 1. Made of high-quality aluminum alloy and plastic material with long service life. 2. Easy to install and easy to use, reliable and it is practical accessory for ladder. 3. Wear resistant, corrosion resistant, not easy to be damaged, durable for long-term use. 4. Convenient for replacement, the worn or old pulley wheel can be replaced directly. 5. Universal ladder pulley wheel, compact structure and high reliability. Specification: Condition: Brand New Item Type: Ladder Pulley Wheel Material: Aluminum Alloy + Plastic Diameter: Approx. 4cm / 1.6in Hole Distance: Approx. 6.5cm / 2.6in Hole Diameter: Approx. 0.5cm / 0.2in Total Height: Approx. 4.5cm / 1.8in Total Length: Approx. 8cm / 3.1in Width: Approx. 1.8cm / 0.7in Wheel Grooves: Approx. 1cm / 0.4in Weight: Approx. 237g / 8.4oz. Package List: 4 x Ladder Pulley Wheel Note: 1. Please allow 0‑2 cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.