Make of zincs alloy and coppers, strong and enduring, rusts resistant and wear-resistant 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 Ball bearing wheel still work smoothly and noiselessly after a 100,000 cycle with 2 rollers 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, Manufacturer: Mllepjdh