Description This garage door roller is made of , which withstand use. Features the nylon and steel material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color:White -Material:Nylon, steel -Size:10.50X4.50X4.50cm/4.13X1.77X1.77in - construction: Makes the door run smoother and quieter with less stress on the door opener. - Quiet operation: Vibration and noise caused by rolling be significantly reduced. - Well constructed: keeping dirt from getting into the bearings, ensuring the garage door works better. - Fit for many residential garage doors, such as standard garage door rails, wooden automatic door rails, and more. - workmanship, reasonable structure, professional and practical, bring you convenience. Package list: 2 x garage door rollers