Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 2L Back Catalog number: TDL31_2L Availability: In the manufacturer's stock Price on request - + Recommended M-MCHOR250 O-Ring, micro-chamber pan seal,pk 4 Price on request OST-201-3421 Tube gas sampling 350, nozzle (GL14), septum Price on request DEV41_5L DEVEX sampling bags 5L, stopcock & septum Price on request