Suitable for patio door, glass door and other sliding door, ensuring smooth and efficient movement and adjust, directly replacing your break or old sliding door rollers Features a side, suitable for the bottom of sliding door, offering smooth movement and reducing frictions Make of aluminum alloy, wear resistant, strong, not easy to break and deforms Heavy duty sliding door rollers with 1-1 / 4inch ball bearing wheel, have a trong load bearing capacity, smooth sliding and low noise, Manufacturer: Kaeltsyn