Description: Compatible for wooden sliding doors of home and office etc. Strong structure, greatly improve the roller capacity, sliding smoothly with super silence, long service life. Easy to install on your cabinet door, cupboard door, drawer door, etc. Material: Stainless Steel 12 Silent Wheels Color: Silver Outer Diameter: Approx. 25mm/ 0.98inch (Seen as picture) Specification: Installation: 1.Drilling holes 2.Hanging wheels:install hanging wheel into hanging rail and install the limitator on both ends of the rail.According to the door height,adjust the screws of the wheel 3.Fixed the rail 4.Slotting:Install the inserting piece on the both ends of door,use screws to fixed with door.Open a down guiding groove of the bottom of door 5.Limit wheel:Put down guiding wheel install on the floor 6.Finish installation:Put the hanging wheels inserting piece into the inserting slot on the door top and fixed it with screws.Put the down guiding wheel to the guiding groove of the door bottom. Package Includes: 2 Pieces Sliding Door Rollers Note: The color may have different as the difference display,pls understand.= Please allow 1-3mm error due to hand test