Polyester gas sampling bag with PTFE dual-valve, 5L Back Catalog number: POL32_5L Availability: In the manufacturer's stock Price on request - + Recommended T-2HD CW agents (in particular HD) cold trap, TT24-7 Price on request U-T7EMP-2S Empty cold trap for UNITY series 2 Price on request 1233 BALLOONS FOR GAS SAMPLING, 4Liters Price on request