BOTAO high quality: high quality POM plastic. Suitable for different types of showers. Make sure your door has the most comfortable slide that won't feel uncomfortable and won't waste money: Did you buy a sliding system and it breaks? You're scared that you need to buy one now. Forget it, there are replacement shower door rollers that can fix any sliding system you have in your home. If you're having trouble sliding your shower door, don't waste your money trying to fix the problem. FITS EVERYWHERE: Shower door slides for shower massage cabins, bathtubs, whirlpools, and even for furniture accessories. Slide open easily and smoothly with our sliding doors or gates. Replacement of damaged systems High-quality shower enclosure with smooth door operation with slight forward or backward movement Shower rollers specially designed for shower enclosures, hydromassage boxes clearly perform the tasks assigned to them, distribution of the quality of the glass, control of the given direction sports. This makes the product more durable and lasts longer Steel parts of the wheel Note: Please allow 1-2 cm error due to possible color and size differences between the light effect photo and the actual product Please note that the stainless steel screws shipped are not the same The picture is different, the upgraded version is shipped. Quantity: (8 pieces) Shower door roller size: single wheel diameter 23 colors as shown