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 C-TDKIT-01 Essential TD Starter Kit Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request P-CP010 VOC-Mole cap assembly,pk10 Price on request