[Quiet and Smooth] The shower door roller wheel is practical, easy to install and maintain. It helps shower door slide smoothly, and open the door noiselessly. It is suitable for massage rooms, bathtubs, whirlpools, and even furniture. It can ensure your door opens easily and smoothly [Premium Aluminum Alloy Material] The curved shower door roller is made of high quality aluminum alloy with chrome and gold plating on the surface. It is rustproof, durable and has a long service life. [Easy to Install and Maintain] It is equipped with anti-collision blocks and mounting screws for easy installation and maintenance. Just align the rollers with the glass mounting holes and use the tool to tighten the screws. The anti-collision block is installed on the track to block the wheels and prevent the glass from colliding. [Scope of Application] The curved shower door roller with a diameter of 23mm is suitable for glass doors with a thickness of 4-6mm. The top and bottom wheels are suitable for glass apertures of 12-14mm. The top wheel can be adjusted by screws to adjust the height to 8mm. The bottom wheel spring height can be automatically adjusted according to the height of the top wheel. [What You Get] The package includes 8 curved shower door rollers with a diameter of 23mm (4 top rollers and 4 bottom rollers), 8 anti-collision pad and 8 stainless steel screws. The fixed pulley can be removed and cleaned with one click, which is very convenient.