1. Shower door roller set: It includes 4 upper rollers and 4 lower rollers, a total of 8; comes with screws and plastic caps. Suitable for glass shower doors, shower cubicle doors, massage cubicle doors or sliding furniture accessories. 2. Material of shower cubicle rollers: Made of brass and ABS plastic, which is sturdy and durable. 3. Dimensions: The roller diameter is about 23 mm and the width is about 6 mm; the maximum glass thickness is 6 mm; the distance from the center of the mounting hole to the glass edge is about 18 mm. 4. Easy to slide: The bathroom slide rails are easy to move and install, can keep the door balanced, and make the door slide with less effort. 5. Product description: 4 upper rollers and 4 lower rollers with plastic caps. A practical accessory for sliding glass shower doors. 6. Material: Brass rods and ABS plastic, sturdy and durable. 7. Roller dimensions: The wheel diameter is about 23 mm and the thickness is about 6 mm; suitable for glass with a thickness of 4 - 6 mm. The distance between the center of the mounting hole and the glass edge is about 18 mm. 8. Adjustable: Upper shower rollers: 8 mm; Lower shower rollers: automatically adjustable. Replacement rollers for glass sliding shower doors. 9. Easy to push: The bathroom track sliders are easy to move and install, can keep the door balanced and make the door slide with minimal force. 10. Application of shower room rollers: Suitable for glass shower doors, shower cubicle doors, massage cubicle doors or sliding furniture accessories. 11. Delivery: 4 x upper shower door rollers, 4 x lower shower door rollers, 8 x plastic caps