Tedlar PVF Gas Sampling Bags with PTFE straight On/Off valve, 2L Back Catalog number: HEDTDL31_2L Availability: In the manufacturer's stock Price on request - + Recommended P-CP020 O-Rings, 23mm × 3mm i.d.,pk 20 Price on request C-EZVOCAK Easy-VOC accessory pack Price on request M-SPC05-250 Collar spacer, alum 5mm, for M-CTE250I,pk 4 Price on request