Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 5L Back Catalog number: TDL31_5L Availability: In the manufacturer's stock Price on request - + Recommended U-COV100 O-Ring, low-emission, size 010, pk/100 Price on request OST-LENZ01320014 Screw caps for screwthread tubes GL14 Price on request U-CENKIT Starter Kit: Centri booster pack (DiffLok caps and O-rings) Price on request