FEP gas sampling bag with PTFE dual-valve, 5L Back Catalog number: HEDFEP32_5L Availability: In the manufacturer's stock Price on request - + Recommended U-COV35 O-Ring, low-emission, size 035,pk10 Price on request M-TCN04 O-Ring, size 007, and spacer,pk 6 Price on request T-13PAM Focusing trap, Photochemical Assessment Monitoring Stations (PAMS), for TT24-7 Price on request