Set of 8 Shower Door Rollers: Consists of 4 top rollers and 4 bottom rollers, total 8; Comes with screws and plastic cover. Suitable for glass shower doors, shower enclosure doors, massage cabin doors or sliding furniture fittings. Shower Enclosure Roller Material: Made of brass and ABS plastic, sturdy and durable. Size: The wheel size is approx. Diameter 25mm, width 6mm; Maximum glass thickness is 6mm; Distance from the center of the mounting hole to the edge of the glass is approx. 18mm. Easy to slide: The bathroom track is easy to move and install, keeps the door in balance and allows the door to slide with minimal effort. Product Description 4 Upper Shower Door Rollers and 4 Lower Shower Door Rollers, with Plastic Cover. A practical accessory for glass sliding shower door. Material: Brass rod and ABS plastic, sturdy and durable. Roller Size: The diameter of the wheel is about 25mm, the thickness is about 6mm; Suitable for glass thickness from 4 to 6mm. The distance from the center