Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: HEDPOL32_2L Availability: In the manufacturer's stock Price on request - + Recommended U-T2GPH-2S UNITY 2 & TD-100 Cold trap general purpose hydrop Price on request U-T15ATA-2S UNITY 2 Cold trap, TO-15/TO-17 Air Toxics C2/3 Price on request SERZ-1070 Spare bag sampling accessory, ACTI-VOC Price on request