Specification Brand : Moonetto BulletPoint : Our USA Lab KF flanges end cap is made with 304 ss and is used to cap off the correct sized KF port, including up to KF 50 BulletPoint1 : Screw cap with silicone plug, fit GL 45 neck size bottle BulletPoint2 : Cap Material: Polypropylene(PP) and PTFE insert, autoclavable BulletPoint3 : Cap O.D.: 54mm BulletPoint4 : Cap I.D.: 45mm BulletPoint5 : Silicone adapter is elastic and seals both bottle and tubings tight Color : Orange ConnectorType : Cap ExteriorFinish : Stainless Steel ExternallyAssignedProductIdentifier1 : 0611851187071 ExternallyAssignedProductIdentifier2 : 611851187071 ItemName : Moonetto 2 Pack Orange GL45 1-Port Safety Filling Cap with One Hole for Glass Bottles, 1/8 Inch OD Tubing, Complete Kit ItemPackageDimensions_Height : 0.79 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 2 ItemShape : Square ItemTypeKeyword : science-lab-cap-plugs Manufacturer : Moonetto Material : aluminum,PTFE ModelNumber : 1L~30L NumberOfItems : 2 PartNumber : LA0039-Orange-1Port-2Pack ProductDescription : Single Valve Bag It's a sampling bag with only one valve installed. Double Valve Bag It's a sampling bag with two identical valves installed on it. The inlet and outlet of the single valve sampling bag pass through one valve Differences One valve of the double valve sampling bag is inlet and the other is outlet. The advantages of the double valve bag are: several small capacity air bags can be connected in series to form a large gas sampling bag; and one in and one out is convenient for cleaning the gas sampling bag