XUEMEI Silent nylon rollerOur wheel is equipped with nylon silent wheels, no scratches on the sliding, soft and stable. You can open and close the door comfortably and quietly. High Quality Material: Sliding door wheel made of high strength nylon, high speed bearing and high quality alloy base plate. The surface is coated with multiple layers of baking paint, thick and not easy to rust, wear-resistant and durable for long-term use. Adjustable height Retractable top wheel is convenient for installation of the door shutter, the adjustable height is suitable for a variety of interior doors and windows. Cylindrical catheter, horizontal rotation structure, smooth sliding without jamming. You will get2 heavy duty sliding door rollers measuring 85 x 45 mm in the dimensions of sliding door fittings. Classic design with black and white color that will perfectly match your doors and windows. It is recommended to install 2-4 pulleys per cabinet door. Multiple ApplicationsVersatile sliding wheels, ideal for cabinets, windows, closets, cabinets, display cases, etc.