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 U-COV100 O-Ring, low-emission, size 010, pk/100 Price on request M-MCAL50 Disposable dish, alum, 50mL,pk100 Price on request M-TSTIN Inserts, PTFE,pk 6 Price on request