100x AirBoss FlexAir 40mm HE2 Nato Respirator gas Filter Cartridge Niosh S-70013. AirBoss FlexAir 40mm HE2 Nato Respirator gas Filter Cartridge Niosh P/N S-70013. Each bag is new and Sealed. No Checks or escrow. 4945 Monaco St Commerce City CO 80022. Sorry we do not offer any warranties on the batteries software and operating system issues. Feedback and Contact Information. Please give us an opportunity to resolve the issue before leaving any bad feedback. We try our best to explain the item with utmost accuracy but sometimes there are human errors.