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 RMK-0020 Routine Maintenance Kit: Tube conditioner (TC-20) Price on request NDV32_5L New DEVEX gas sampling bags with PTFE dual-valve, 5L Price on request M-TICAP Tube interface cap for removable lid,pk 6 Price on request