Specification Brand : Puritan BulletPoint1 : Package Dimensions: 6.0" (L) x 8.0" (W) x 24.0" (H) BulletPoint2 : Product Type: Lab Supply BulletPoint3 : Package Quantity: 1 BulletPoint4 : Country Of Origin: United States BulletPoint5 : Capacity : 600 milliliters Color : Silver ExternallyAssignedProductIdentifier1 : 0779675550799 ExternallyAssignedProductIdentifier2 : 779675550799 IncludedComponents : Swab ItemName : Puritan 25-806 1PC BT Sterile Standard Cotton Swab with Plastic Handle & Tube, 6" Length (Pack of 100) ItemPackageDimensions_Height : 18.288 centimeters ItemPackageDimensions_Length : 12.192 centimeters ItemPackageDimensions_Width : 13.462 centimeters ItemPackageQuantity : 1 ItemShape : Square ItemTypeKeyword : science-lab-swabs Manufacturer : Puritan Medical Products Material : Cotton ModelNumber : 1201U11PK NumberOfBoxes : 1 NumberOfItems : 100 NumberOfPieces : 4 PartNumber : 1201U11PK 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