1、The product is made of high-quality stainless steel, which is not easy to deform and durable. 2、The wheel is made of copper and is not easy to rust. 3、The product is equipped with nylon damping brake device for easy fixing. 4、With careful polishing, the product is smooth and low noise. 5、Multi mounting holes for installation, more solid. Feature: The product is made of high-quality stainless steel, which is not easy to deform and durable. The wheel is made of copper and is not easy to rust. The product is equipped with nylon damping brake device for easy fixing. With careful polishing, the product is smooth and low noise. Multi mounting holes for installation, more solid. Specification: Material: Stainless and nylon, copper Application: Sliding door Size: 75 * 38mm / 3 * 1.5in Package list: 2 * Door Roller Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.