Repalcement septum for Tedlar bag TDLC31Z Back Catalog number: TDLC-S Availability: In the manufacturer's stock Price on request - + Recommended U-CENKIT Starter Kit: Centri booster pack (DiffLok caps and O-rings) Price on request T-11OP Ozone precursors trap, TT24-7 Price on request 1232 BALLOONS FOR GAS SAMPLING, 2Liters Price on request