Quality Material: the sliding glass door wheels are made of stamped steel and galvanized with yellow zinc; The wheel is made of durable plastic, which can provide smooth, lasting and quiet rolling with narrow concave edgesEasy to Replace: our sliding door rollers replacement is installed at the bottom of the sliding mirror wardrobe door, and the central screw is applied to adjust the height of the door after installation; The top adjusting screw can be quickly adjusted with a crosshead screwdriver, and the loosening can be easily stopped with a fixing nut; The slotted metal bracket can be separated from the shell separatelyWhat You Get: the package includes 4 pieces of sliding glass door rollers, excluding bolts, enough to meet your daily needs, or you can keep them for spare or share them with your friends and familySize Information: the steel shell of closet sliding door hardware has a 2-1/2 inch mounting hole center, its main body width is 1-7/8 inches, the diameter of ball bearing is 1-1/2 inches, and the single plug in metal bracket is 1-5/8 inches wide and 1/2 inch thick; Please refer to the size drawing for details, and determine the size before purchasingWidely Applied: if your sliding wardrobe door starts to get stuck or keeps jumping out of the track, it's time to replace our sliding door wheels, suitable to replace wooden rollers or metal sliding mirror doors and other contractors' mirror doors