Our sash double wheel roller is made of stainless steel , durable and practical for long period to use. The sash double wheel roller can slide smoothly within the track, convenient to use. Widely used in windows, bedrooms, office, restaurants, sliding doors, etc. Features - Color: As shown. - Material: Stainless steel. - Size: 6.40X1.60X1.42cm/2.52X0.63X0.56inch. - The sash double wheel roller can be suitable for sliding door and sliding window, suitable for most tracks. - Durable and use. The sash double wheel roller can roll freely and slide smoothly in the rails. - Easily move from track to track and from open to closed, flexible and useful, strong bearing capacity, is not easy to break. - This sash double wheel roller is very easy to install and simple to operate, giving you huge convenience. - Widely used in windows, closets, office, restaurants, bedrooms, sliding doors, excellent and reliable. Package list: 4 x Width Double Wheel Pulleys