Specification Brand : YUEBM Label : YUEBM Manufacturer : YUEBM MaterialType : Steel PackageDimensions_Weight : 2.81089384050 PackageDimensions : L:4.9599999949408 X W:3.699999996226 X H:2.199999997756 ProductGroup : Home Improvement ProductTypeName : BUILDING_MATERIAL Publisher : YUEBM SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41xYGhrEgXL._SL75_.jpg SmallImage_Width : 75 Studio : YUEBM Title : 2PCS YUEBM Track Roller Wheels Accessory Parts of The Beam Trolley System Used with Box Rail Strut Channel to Mount Heavy Barn or Shed Sliding Doors Weight : 2.8 WeightUnit : pounds