Specification Binding : Electronics Brand : newstuffs Color : Black Label : cjlymx-us Manufacturer : cjlymx-us Model : IS-THC856 PackageDimensions_Weight : 0.4409245240 PackageDimensions : L:7.87401574000 X W:7.87401574000 X H:5.90551180500 PartNumber : IS-THC856 ProductGroup : Photography ProductTypeName : CAMERA_SUPPORT Publisher : cjlymx-us SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/4191KsMwgoL._SL75_.jpg SmallImage_Width : 75 Studio : cjlymx-us Title : Lens Foot Tripod Mount Ring Stand Base for Canon EF 300mm f/2.8L is II USM, EF 200-400mm f/4L is USM Extender 1.4X, EF 400mm f/2.8L is II USM, EF 500mm f/4L is II USM, EF 600mm f/4L is II USM Weight : 0.4 WeightUnit : pounds