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: Product material:Nylon Size: Door wheel diameter 22mm/0.8inch Package list: 2* plastic parts 2* pulley 2* nut 2* gasket .wang-edit-text font-family:'Arial' important; .wang-edit-text table border-top: 1px solid 000; border-left: 1px solid 000; .wang-edit-text table td, .wang-edit-text table th border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; .wang-edit-text table th text-align: center; 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, anti-aging 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