Set of 8 shower door rollers: consisting of 4 upper rollers and 4 lower rollers, a total of 8; Delivery with screws and plastic cover. Suitable for glass shower door, shower cabin door, massage cabin door or sliding furniture fittings. Roller material of the shower cabin: made of brass and ABS plastic, sturdy and durable. Size: The wheel size is approx. 23mm in diameter, 6mm in width; the maximum glass thickness is 6 mm; The distance from the center of the mounting hole to the edge of the glass is approx. 18 millimeters. Easy to slide: The bathroom slider is easy to move and install, keeps the door balanced and allows the door to slide with minimal effort. Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.