Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: HEDMBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended T-11OP Ozone precursors trap, TT24-7 Price on request M-TICAP Tube interface cap for removable lid,pk 6 Price on request 1970-0011-R O-RING -011 .301 ID X .070 W Each Price on request