Specification Brand : Gold Tip BulletPoint1 : Gold Tip FACT Weight Module BulletPoint2 : 20 grain; Gold Tip's threaded inserts are precisely machined from only top-grade materials BulletPoint3 : 100 count; Quality controlled to industry-leading specification tolerances BulletPoint4 : 100 count; An insert that ensures complete concentricity for repeatable accuracy BulletPoint5 : Color : Blue-10Packs ExternallyAssignedProductIdentifier1 : 791331212575 ExternallyAssignedProductIdentifier2 : 0791331212575 ExternallyAssignedProductIdentifier3 : 00791331212575 IncludedComponents : sticky swab gel ItemName : Gold Tip FACT Weight Module (100 Count), 20-Grain ItemPackageDimensions_Height : 0.762 centimeters ItemPackageDimensions_Length : 16.002 centimeters ItemPackageDimensions_Width : 10.16 centimeters ItemPackageQuantity : 1 ItemShape : Square ItemTypeKeyword : science-lab-weights Manufacturer : Gold Tip Material : aluminum,PTFE ModelNumber : WS24620100 NumberOfItems : 5 PartNumber : WS24620100 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