General Description: These sliding shower door rollers are designed for smooth and quiet operation. Made of stainless steel and PA plastic, they are moisture-resistant and durable, ensuring a long lifespan. With a diameter of 23 mm, these rollers are suitable for glass doors 4 to 6 mm thick and fit mounting holes with a diameter of 11 mm. Technical Specifications: Material: Stainless steel, PA plastic, POM wheel; Roller Diameter: 23 mm; Compatible Glass Thickness: 4 to 6 mm; Mounting Hole: 11 mm diameter; Quantity: 8 rollers (4 upper and 4 lower). Installation: To install the rollers, align them with the glass mounting holes and use a screwdriver to tighten the screws. A nut is included to protect the screw from moisture and reduce rust. Usage: These rollers are ideal for sliding doors in bathrooms, making it easier to open and close the doors. They are also suitable for shower rooms, massage cabins, and massage baths. Additional Information