[Material]:Slide Gate Rollers are made of nylon,with good toughness,wear resistance,and long term use [Applicable]:Gate Rollers are suitable for most sliding door types and fences [Easy to install]:Sliding Gate Nylon Rollers are easy to install on the column wall,convenient and fast [Applicable scenarios]:Sliding Gate Nylon Rollers are good for your garden sliding door,or patio fence.Strengthen and avoid sliding doors from falling off [Application]:Ideal for use in courtyard doors,it provides seamless guidance and support to the door's movement along its track, Weight: 1.12656215882 pounds, Manufacturer: ALCXAZS