Usage Tips:Features: Rolling smooth: Over the course of repetitive use, the wheel on some aged, heavy wood closet doors might wear out and get stuck. These wheels maintain a consistent space from the mounting bracket, allowing them to fit securely into the sliding groove. Replace the old rollers with these, and the door will slide smoothly with minimal effort. The improvement is remarkable. Easy to control: Designed with built-in ball bearings for smooth and quiet operation, offering precise movement control. You can guide the drawer exactly where you want it to go. Made of ABS plastic, the roller surface has balanced firmness, providing reliable support. Combined with hubs made of solid bearing steel, they effortlessly support the weight of the door. These rollers can be used to repair old kitchen drawer slides or replace rollers in patio stove drawers. They offer versatile application options. Specifications: Material: ABS Size: 19: Approx. 18.5mm 20: Approx. 20mm 25: Approx. 25mm 27: Approx. 27mm Note: Please allow 1-2 cm errors due to manual measurement. Ensure you are comfortable with this before ordering. Due to differences in monitor displays, the picture may not reflect the actual color of the item. Package includes: 8 Piece/set Bearing Rollers