Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: POL32_2L Availability: In the manufacturer's stock Price on request - + Recommended U-T7EMP-2S Empty cold trap for UNITY series 2 Price on request M-MCTOPI Removable lids for M-CTE120I, inert,pk 6 Price on request U-T15ATA-2S UNITY 2 Cold trap, TO-15/TO-17 Air Toxics C2/3 Price on request