Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 5L Back Catalog number: TDL31_5L Availability: In the manufacturer's stock Price on request - + Recommended M-MCHOR O-Ring, micro-chamber pan seal, for M-CTE120I,pk 6 Price on request U-T13DHS-2S DHS application cold trap, UNITY 2/xr andTD-100/xr Price on request U-TO15-KXR Focusing trap, Trace TO-15, for UNITY-xr with Kori-xr Price on request