Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 5L Back Catalog number: HEDTDL31_5L Availability: In the manufacturer's stock Price on request - + Recommended M-SPC15-250 Collar spacer, alum 15mm, for M-CTE250I,pk 4 Price on request HEDPOL32_2L Polyester gas sampling bag with PTFE dual-valve, 2L Price on request U-COV07 O-Ring, low-emission, size007, pk 10 (TD autosampl Price on request