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 P-CP020 O-Rings, 23mm × 3mm i.d.,pk 20 Price on request U-COV10 O-Ring, low-emission,size 010, pk10(e2/e3 systems) Price on request HEDFLD32_5L Fluode gas sampling bag with PTFE dual-valve, 5L Price on request