Tedlar® PVF Sampling Bags PTFE On/Off valve, 1,6L Back Catalog number: HEDTDLC31Z_1.6L Availability: In the manufacturer's stock Price on request - + Recommended U-COV10 O-Ring, low-emission,size 010, pk10(e2/e3 systems) Price on request HEDDEV21_0.5L Devex bag with PC valve, 0,5L Price on request U-T9TNX-2S Unity 2/TD-100 Cold trap, Tenax TA Price on request