11.Hese are 22mm door wheel kits designed for halls greenhouses as well as several other models.these are genuine halls greenhouse wheel kits as fitted from new. 22.Sliding free, antiaging 33.Light weight and easy to recycle 44.Long service life and beautiful appearance, easy to move back and forth by sliding the door roller 55.Quality assurance, easy installation Features: 1. Are 22mm door wheel kits designed for halls greenhouses as well as several other models.these are genuine halls greenhouse wheel kits as fitted from new. 2.Sliding free, anti-aging 3.Light weight and easy to recycle 4.Long service life and beautiful appearance, easy to move back and forth by sliding the door roller 5.Quality assurance, easy installation Specification: Condition: brand new Product material:Nylon Size: Door wheel diameter 22mm/0.8inch Package list: 2* plastic parts 2* pulley 2* nut 2* gasket