Multi-layer gas sampling bags, PP valve (4.76mm), 1L Back Catalog number: MBT71_1L Availability: In the manufacturer's stock Price on request - + Recommended M-MCTL250 Sample Pan Removal Tool, for high temp Micro-chamber Price on request T-4ATX Air toxics cold trap, TT24-7 Price on request C-KIT325T-2S 325 Tube Kit Price on request