Tedlar PVF Gas Sampling Bag with PTFE dual-valve, 2L Back Catalog number: TDL32_2L Availability: In the manufacturer's stock Price on request - + Recommended T-13PAM Focusing trap, Photochemical Assessment Monitoring Stations (PAMS), for TT24-7 Price on request U-COV35 O-Ring, low-emission, size 035,pk10 Price on request M-MCHOR250 O-Ring, micro-chamber pan seal,pk 4 Price on request