Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: POL32_2L Availability: In the manufacturer's stock Price on request - + Recommended M-MCHOR250 O-Ring, micro-chamber pan seal,pk 4 Price on request M-DSKPF Sample disc, 1.0mm thickness, PTFE,pk 6 Price on request U-COV100 O-Ring, low-emission, size 010, pk/100 Price on request