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 T-6EMP Empty cold trap, TT24-7 Price on request U-T22117-2S Focusing trap, China Air 117, for for UNITY-xr, TD100-xr, Centri Price on request