Suitable for furniture , hardware accessories , mobile door , glass sliding door , aluminum door and window , shower pulley and drawers : just remove the break or missing tandems roller assemblies from your sliding glass door or window , then install our glass patios door rollers Make of zincs alloy and coppers , strong and enduring , rusts resistant and wear-resistant Remove the damaged or old roller from the patios door Clean the track to ensures none particles , then install our stainless steel tandems roller assembly Ball bearing wheel still work smoothly and noiselessly after a 100 , 000 cycle with 2 rollers, Manufacturer: YUGSHNKFC