Tedlar® PVF Sampling Bags PTFE On/Off valve, 0,3L Back Catalog number: HEDTDLC31Z_0.3L Availability: In the manufacturer's stock Price on request - + Recommended 1970-0011-R O-RING -011 .301 ID X .070 W Each Price on request M-TCN04 O-Ring, size 007, and spacer,pk 6 Price on request HEDPOL32_2L Polyester gas sampling bag with PTFE dual-valve, 2L Price on request