[DURABLE MATERIAL] Shower door rollers are made of alloy material, offering strong hardness and wear resistance. These sliding shower door wheels are designed for long-term use in humid environments. [SIZE] The shower door rollers measure 23mm. The set includes 4 pieces of aluminum alloy upper and lower double wheels, providing sufficient quantity for standard replacement needs. [EASY TO SLIDE AND NO NOISE] These shower door rollers ensure smooth and quiet operation, allowing the shower door to open and close effortlessly. They help save space and enhance the overall aesthetic of your bathroom. [SCOPE OF USE] The shower door rollers are easy to install and compatible with most shower rooms, sauna rooms, and steam rooms. [VERSATILE APPLICATION] Suitable for use on massage cabins, bathtubs, whirlpools, and other sliding door furniture applications. These sliding shower door wheels offer a long lifespan and reliable performance. Color: Silver Material: Alloy Package Contents: 4 x Shower Door Rollers 4 x Anti-collision blocks 4 x Screws Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 1-3cm.