Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: HEDMBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended P-00010 VOC-Mole assembly, 230mm,pk10 Price on request C-EZVOCAK Easy-VOC accessory pack Price on request T-6EMP Empty cold trap, TT24-7 Price on request