Our chrome shower door rollers allow your shower door to glide effortlessly The universal design ensures they fit most shower cubicles, shower enclosures and steam rooms p> Made from strong and reliable materials including durable zinc alloy and tough plastic Comes with 2 double rollers at the top and 2 at the bottom, 4 short pieces and 2 spare double rollers) for glass thickness 4-6mm The wheels are 25mm in diameter, 6mm thick and fit glass holes with a diameter of 12mm< /p>