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 M-MCTOP250I Removable lids for M-CTE250I, inert,pk 4 Price on request M-MCTOPI Removable lids for M-CTE120I, inert,pk 6 Price on request U-COV07 O-Ring, low-emission, size007, pk 10 (TD autosampl Price on request