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 HEDMBT71_1L Multi-layer gas sampling bags, PP valve (4.76mm), 1L Price on request C-CL010 Penclips, pk10 Price on request RMK-0006HT Routine maintenance kit for M-CTE250I Price on request