Set of 8 shower door rollers: consisting of 4 upper rollers and 4 lower rollers, 8 in total; supplied with screws and plastic cover. Suitable for glass shower doors, shower cubicle doors, massage cabin doors or sliding furniture fittings. Shower enclosure roller material: Made of brass and ABS plastic, sturdy and durable. Size: The size of the wheel is approx. 23 mm in diameter, 6 mm in width; the maximum glass thickness is 6 mm; the distance between the center of the mounting hole and the edge of the glass is approx. 1.5 cm. Easy to slide: The bathroom slider is easy to move and install, holds the door in place, balances and allows the door to be opened by sliding with minimal effort.