Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: POL32_2L Availability: In the manufacturer's stock Price on request - + Recommended U-HSVB-20 Replacement Vial Block, for HiSorb Agitator Price on request P-00020 VOC-Mole assembly, 380mm,pk10 Price on request C-CL100 Penclips, pk100 Price on request