Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: HEDMBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended U-T20PAM-2S Focusing trap, Photochemical Assessment Monitoring Stations (PAMS), for UNITY-xr, TD100-xr, Centri Price on request U-T10CW-2S Chemical Warfare agents cold trap Price on request U-T3ATX-2S Air Toxics, C2 - C14 (TO-14), cold trap Price on request