Specification Brand : MagnaKoys BulletPoint1 : GPI Thread Finish: 18-400 BulletPoint2 : Shell Material: Polypropylene BulletPoint3 : Liner Material: PE Cone Lined BulletPoint4 : Cap Color: Black BulletPoint5 : You Receive: 40 pcs. of Black 18-400 Polycone Insert Caps Color : Black ExternallyAssignedProductIdentifier1 : 0646816972119 ExternallyAssignedProductIdentifier2 : 646816972119 ItemName : Magnakoys Black 18-400 Polycone Continuous Thread Closure Caps for Vials (18-400, Black, 40) ItemTypeKeyword : science-lab-glassware-labware-caps Manufacturer : MagnaKoys® Material : phenolic NumberOfItems : 40 PartNumber : M18400P-40 ProductDescription : Magnakoys 18-400 Polycone Continuous Thread Closure Black Caps. Fits our following products: 4 Dram Vials and 1/2 Ounce Boston Round Bottles. See our images on top left for explanation on how to fit caps to vials. ProductSiteLaunchDate : 2017-07-20T14:00:00.000Z Size : 18-400 UnspscCode : 41000000