Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: MBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended U-T12ME-2S Materials emissions, C4 - C32, cold trap Price on request SERZ-1070 Spare bag sampling accessory, ACTI-VOC Price on request U-T4WMT-2S Water Management, ethane - C20, cold trap Price on request