Check the listing for details. Roller Idler Bearing Pulley, 8 x 35 x 15mm Sliding Flat Wheel White Pack of 4. Condition: New. Listed at 20.23 USD. What is this?Roller Idler Bearing Pulleys are designed for smooth and quiet operation in various applications such as furniture hardware accessories, sliding doors, windows, and mechanical equipment.What will I get?You will receive a pack of 4 White wheels, made of plastic and stainless steel, which can support a loading weight of up to 67 KG (147 LB).Wheel Overall Size: 8 x 35 x 15mm / 0.31 x 1.38 x 0.59 inch (Inner Width*Diameter*Outer Width)Are there any advantages of the product?Sturdy stainless steel construction with rust-resistant plastic wrap, smooth and silent operation from internal lubrication. U-shape groove design, can endure heavy loads and continuous use while maintaining performance.How to use it?These pulley wheels are easy to use and install, designed to fit tracks or shafts with a matching diameter.