Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 5L Back Catalog number: HEDTDL31_5L Availability: In the manufacturer's stock Price on request - + Recommended U-COV450 O-Rings, low-emission,pk100 Price on request C-HSPH HiSorb handle, for manual probe extraction Price on request C-HSINS10-6 Agitator spacer for vials, 20mL to 10mL, pk/6 Price on request