Tedlar PVF Gas Sampling Bag with PTFE dual-valve, 5L Back Catalog number: TDL32_5L Availability: In the manufacturer's stock Price on request - + Recommended U-COV100 O-Ring, low-emission, size 010, pk/100 Price on request M-CHCT-250 Calibration tool for M-CTE250I, pk 4 Price on request M-MCAL50 Disposable dish, alum, 50mL,pk100 Price on request