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 T-6EMP Empty cold trap, TT24-7 Price on request C-TAGKT TubeTAG starter kit (for SS tubes) Price on request RMK-0026 Routine Maintenance Kit: Kori-xr Price on request