Stable and Noiseless Sliding: The shower screen rollers are made of ABS + zinc alloy, which has strong supporting force and anti-rust, and can be used for a long time in a humid environment. Besides, its bearings are flat and smooth, and the door can be moved easily by gently pulling the door, and there is no noise when moving. Easy to install: Comes with a anti-collision block and mounting screws to make it easy to install and maintain. Just line up the rollers with the glass mounting holes and use tools to tighten the screws. The anti-collision block is installed on the rail to block the wheels and prevent the glass from bumping into each other A good helper: the shower door fixing pulleys are suitable for most shower rooms, shower screens, shower cabins and steam cabins, installed on the top and bottom of the shower door, for easy opening and closing. It is a good helper for bathroom sliding doors. Size: suitable for glass opening: 12-14mm. Suitable for glass thickness: 4-6mm. Wheel diameter: 23mm (approx.) Features: Top qualityMade of high quality materials, durable. 1. Easy to slide on and clean. 2. These single shower door rollers fit glass shower doors. 3. Uses: shower room, sliding door partition, sliding door, balcony door 4. This shower door roller is suitable for most showers. 5. The structure of the shower door rollers made of brass and plastic. Features: Material: ABS + zinc alloy. Color: silver. Suitable for glass opening: 12-14mm. Suitable for glass thickness: 4-6mm. Wheel diameter: 23mm (approx). Notes: 1. Due to various factors such as screen brightness, light brightness, etc., the actual color of the product may be slightly different from the pictures shown on the website. 2. Please allow slight manual measurement differences in the data. Package Contents4 pulleys (2 from top to bottom).