Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: HEDPOL32_2L Availability: In the manufacturer's stock Price on request - + Recommended U-T17O3P-2S Ozone precursors cold trap, UNITY 2/xr and TD-100/ Price on request M-MCHOR250HT O-Ring, micro-chamber pan seal,pk 4 Price on request HEDTDLC31Z_0.3L Tedlar® PVF Sampling Bags PTFE On/Off valve, 0,3L Price on request