... life time 4,CE Automatic Digital Tire Inflator /car repair equipment/nitrogen tyre inflator equipment BN-609 Technical feature:2 ... Nitrogen Generator produce high purity N2 for inflating tyres, with inflating with N2, you can get: 1, Longer term stability ... economy Nitrogen characteristic:Stable chemist character, Bigger molecule comparing with air, Avoiding leaking and swelling after long time usage ...