Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: MBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended T-6EMP Empty cold trap, TT24-7 Price on request U-RACK02 Maxi Rack (1 L to 6L canisters) Price on request P-CP010 VOC-Mole cap assembly,pk10 Price on request