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 U-COV1516 Spare O-ring, black, for POD sampler (support body), pk 10 Price on request 1233 BALLOONS FOR GAS SAMPLING, 4Liters Price on request U-T5O3F-2S Ozone precursors/Freon cold trap Price on request