Button rollers with buffer springs for installation. Suitable for flat sliding shower doors and curved sliding shower doors.The top roller has no buffer spring, you can adjust the position of the wheel by adjusting the screw.Made of heavy-duty zinc alloy brackets, stainless steel and wear-resistant nylon wheels. and high quality. Designed with wear-resistant pads, more durable to use.colour: silverMaterial: nylon + zinc alloy + stainless steelsize: 23mmPackage Contents:2 x Top Rollers2 x Bottom Rollers2 x Bumper Block1 set x ScrewsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it