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 OST-201-3421 Tube gas sampling 350, nozzle (GL14), septum Price on request HEDPOL32_5L Polyester gas sampling bag with PTFE dual-valve, 5L Price on request T-8MAT Materials emissions cold trap, TT24-7 Price on request