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-T9TNX-2S Unity 2/TD-100 Cold trap, Tenax TA Price on request U-T4WMT-2S Water Management, ethane - C20, cold trap Price on request U-T2GPH-2S UNITY 2 & TD-100 Cold trap general purpose hydrop Price on request