HIGH OF QUALITY: High quality POM plastic. fit different kinds of showers.Ensure your doors the most comfortable glide NO DISCOMPORT & NO WASTE OF MONEY: Did you buy a sliding system and it broke? You think with horror that now need to buy a new. Forget about it! There is replacement shower door roller which will fix for you any sliding system in your home. If you are having trouble with sliding the shower doors, use this quick fix and do not waste your money APPLICATION ANYWHERE: Shower Door Runners for showers massage cabins, bathtubs, whirlpool and even for furniture fittings. Make sure with our runners the door or the doors slide open easily and smoothly. Replace your broken system high quality Shower Enclosure Rollers BEARING COMPONENT: Smooth running of the door slight movement forward or back design effortlessly shower rollers for shower cabins, hydromassage boxes clearly perform the task assigned to them, distribute the mass of the glass, control the movement in the given direction. This gives the product even more durability and longer service life Steel part of the wheel: 9mm diameter x 3mm height