【Silent Nylon Roller】Our wheel is equipped with silent nylon wheels, no scratches on sliding, smooth and stable. You can open and close the door comfortably and quietly.【High Quality Material】Sliding door roller 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】The retractable top wheel is convenient for installing door shutters, adjustable height suitable for a variety of interior doors and windows. Cylindrical catheter, horizontal rotation structure, smooth sliding without jamming.【Package Included】2 sets of heavy duty sliding door rollers measuring 85 x 45 mm in the dimension of sliding door fittings. Classic design with black and white color that will perfectly fit your doors and windows. It is recommended to install 2-4 pulleys per cabinet door.【Multiple Applications】Versatile sliding wheels ideal