Simple wheel 8-piece shower door rolls, includes 4 upper rolls and 4 lower rollers. Good for replacement shower door rolls. The diameter of the wheel is 25 mm, the width of the wheel is 6 mm. The distance between the center of the mounting hole and the edge of the glass is 25 mm. The shower door roll is made of a brass rod and an ABS plastic material, it is Resistant to rust, robust and durable. Comes with screws and plastic lid. These simple shower door casters adapt to glass shower doors.The doors sliding rollers kits makes the door sliding and saves effort. A practical hardware for the sliding glass shower door. The bath path is easy to move and install. It can also move the door to save your space. Specification: Material: ABS plastic Size: Diameter of the wheel: 25 mm Minimum glass mounting hole: 11 mm The distance between the center of the mounting hole and the glass edge: 25 mm Suitable for most shower doors. The package includes: 4 pieces Rollers upper shower door 4 pieces rolls lower shower door Have a great time shopping!