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 C-CL100 Penclips, pk100 Price on request C-POD-KIT01-5TD POD Starter Kit: Carbograph 5TD Price on request P-CPU10 Unions, for VOC-Mole cap assembly,pk10 Price on request