Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 2L Back Catalog number: HEDTDL31_2L Availability: In the manufacturer's stock Price on request - + Recommended M-CHCT-250 Calibration tool for M-CTE250I, pk 4 Price on request M-MCHSI Sample pans for M-CTE120I, inert,pk 6 Price on request U-CENKIT Starter Kit: Centri booster pack (DiffLok caps and O-rings) Price on request