Polyester gas sampling bag with PTFE dual-valve, 2L Back Catalog number: POL32_2L Availability: In the manufacturer's stock Price on request - + Recommended M-MCHOR250HT O-Ring, micro-chamber pan seal,pk 4 Price on request U-COV450 O-Rings, low-emission,pk100 Price on request 1970-0007 O-RING-007 .145 ID x .070 W for LFS-113 (5 Required ) Each Price on request