Specification Binding : Misc. Brand : Bio Plas Color : Black IsAdultProduct : false Label : Bio Plas Manufacturer : Bio Plas MaterialType : Polypropylene Model : 4222R NumberOfItems : 1000 PackageDimensions_Weight : 0.5 PackageDimensions : L:6.899999992962 X W:5.299999994594 X H:1.99999999796 PartNumber : 4222R ProductGroup : BISS Basic ProductTypeName : LAB_SUPPLY Publisher : Bio Plas SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/314g7iMThIL._SL75_.jpg SmallImage_Width : 75 Studio : Bio Plas Title : Bio Plas 4222R Screw Caps with O-Rings for Bio Plas Screw Cap Conical Microcentrifuge Tubes, Black (Pack of 1000) Weight : 0.5 WeightUnit : pounds