8pcs Shower Door Roller Set: Consisting of 4 top rollers and 4 bottom rollers, a total of 8; Comes with screws and plastic cover. Suitable for glass shower door, shower cubicle door, massage cubicle door or sliding furniture fittings. Shower cubicle roller material: 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 6mm; The distance from the center of the mounting hole to the edge of the glass is approx. 18 millimeters. Easy to slide: The bathroom runner is easy to move and install, keeps the door balanced 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 fitting for sliding glass shower door. Material: Brass rod and ABS plastic, sturdy and durable. Roller size: The wheel diameter is about 23 mm, the thickness is about 6 mm; Suitable for glass thicknesses of 4 to 6 mm. The