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 RMK-0020 Routine Maintenance Kit: Tube conditioner (TC-20) Price on request U-T13DHS-2S DHS application cold trap, UNITY 2/xr andTD-100/xr Price on request P-00010 VOC-Mole assembly, 230mm,pk10 Price on request