Specification Brand : stonylab Color : For rod diameter up to 21mm Label : StonyLab Scientific Manufacturer : StonyLab Scientific MaterialType : Aluminum NumberOfItems : 2 PackageDimensions_Weight : 0.2645547144 PackageDimensions : L:7.2834645595 X W:3.0708661386 X H:1.3385826758 PartNumber : BossHeadClamp ProductGroup : BISS Basic ProductTypeName : HARDWARE_CLAMP_VISE Publisher : StonyLab Scientific Size : For rod diameter up to 21 mm SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41SsDAQOR6L._SL75_.jpg SmallImage_Width : 75 Studio : StonyLab Scientific Title : StonyLab 2-Pack Adjustable Bosshead Clamp Holder, Lab Heavy Duty Boss Head Clamp Holder Aluminum Alloy Body, up to 21mm Rods for Laboratory Use Weight : 0.3 WeightUnit : pounds