Features: Rolling smooth:Over the course of repetitive use,the-original wheel on some aged,heavy wood closet door might wear out and stuck.These wheel will keeping certain space from the mounting-bracket and therefore fit nicely into the sliding-groove.<br> Now-you-can replacement the-rollers with these,they will slide like silk - almost no effort for them to move.The improvement is really unbelievable.<br> Easy to control:With a build-in ball-bearing so-easy to use,it is so quiet almost feel like ice skating.You can control the drawer going exactly the direction you want it to-go.<br> They-are made of-ABS,the plastic-roller surfaces is not too-hard or too soft,providing excellent support. Combining hubs made of solid-bearing steel,they will hold the weight of the door with ease.<br> You can use these for repairing old kitchen drawer-slide-rollers or to replade-rollers in patios stove drawer.You have multiple-choice to apply them.<br> Specifications: Material:ABS<br> Size:<br> 19: Approx.18.5mm/7.28"<br> 20: Approx.20mm/7.87"<br> 25: Approx.25mm/9.84"<br> 27: Approx.27mm/10.62"<br> Package Includes: 8Piece/set Bearing-Rollers<br> note: Please allow 1-2cm errors due to manual measurement,Please make sure that you do not mind before you order.<br> Due to the difference between different monitors, the picture may not reflect the actual color of the item.