1、Applicable Hinge: The garage door hinge quiet roller sleeves could perfect fit for garage door hinges with a roller shaft diameter of less than 11mm and a hinge hole diameter larger than 12mm. 2、Roller Sleeve and Nuts Size: Each roller sleeve measures 11mm in inner diameter, 0.25mm in wall thickness, and 80mm in length. The roller shaft nut features a 10.5mm inner diameter and 22mm outer diameter. 3、Designed for Quieter Operation: These hinge quiet roller sleeves are designed to be installed on the roller shaft, providing a cushion between the roller and hinge and filling in space to avoid squeaky sounds. 4、Solid Construction: These sleeves are compatible with most hinges, fitting snugly on roller rods, and are ideal for new rollers or those with clean rods. 5、Easy Installation: When installation becomes challenging, you can cut along the length of the tube with scissors to create a 'C' shape for ease of application.