Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: MBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended U-TO15-KXR Focusing trap, Trace TO-15, for UNITY-xr with Kori-xr Price on request M-TSTIN Inserts, PTFE,pk 6 Price on request T-13PAM Focusing trap, Photochemical Assessment Monitoring Stations (PAMS), for TT24-7 Price on request