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 C-HSPH HiSorb handle, for manual probe extraction Price on request T-12AM Focusing trap, Air Monitoring, for TT24-7 Price on request U-ULKIT TD automation/ULTRA-xr starter kit Price on request