Specification Binding : Camera Brand : iShoot Color : Silver Label : iShoot Manufacturer : iShoot MaterialType : Aluminum Model : IS-SM1550 PackageDimensions_Weight : 0.661386786 PackageDimensions : L:6.6141732216 X W:5.1968503884 X H:4.1732283422 PartNumber : IS-SM1550 ProductGroup : Photography ProductTypeName : CAMERA_LENSES Publisher : iShoot SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/31be8VUERUL._SL75_.jpg SmallImage_Width : 75 Studio : iShoot Title : Lens Support Collar Tripod Mount Ring for Sigma TS-31 AF APO 50-500mm F4.5-6.3 DG OS HSM, AF APO 120-300mm F2.8 DG OS HSM, AF APO 120-400mm F4.5-5.6 DG OS HSM -Bottom is Camera Quick Release Plate Weight : 0.7 WeightUnit : pounds