Long Service LifeThe shower door rollers are made of high quality brass rods and ABS material, suitable for different kinds of showers. No rust, durable and stable quality and long life. [Size] Wheel diameter: 23mm, the bath mat is suitable for glass doors with a thickness of about 4-6mm. Compatible with mounting holes between 10 and 12 mm in diameter. Day or night, it can effectively reduce the noise generated when the door is closed. Easy to Slide: Casters for showers and massage rooms, bathrooms, hot tubs and even furniture accessories. With our rollers, doors and sliding systems are easy and smooth. Ease of use: The shower guide must be replaced. This repair can be done independently, for which you usually only need the right type of shower stall casters and a screwdriver. ApplicationShower door rail for shower, massage room, bathtub, jacuzzi and even furniture accessories. Replacement rollers for shower door. Replacement rollers for 23 mm diameter shower doors. These rollers glide easily and are designed for 4-8mm glass doors. The construction of the wheel is made of brass and plastic. Specification: Material: Copper + POM. Pulley diameter: 23 mm. Glass thickness: 4 to 6 mm.