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 HEDFEP32_2L FEP gas sampling bag with PTFE dual-valve, 2L Price on request U-T7EMP-2S Empty cold trap for UNITY series 2 Price on request U-HSAG-20 HiSorb Agitator, accommodates 16 vials (20mL) Price on request