I bought it here for about $9. The first thing that struck me was how cheap it felt in my hands when I pulled it out of the box. I'm thinking what cheap crap I bought. I went to Costco, filled the tires with nitrogen and put it on their gauge. My god, this gauge was accurate compared to the Costco and T gauge monitor. I scratched the back of my head. How can something be so cheap and the plastic we had was so damn good. I am 100% satisfied and glad I bought it. Rschunimagu. Thank you Revain and this company for a great deal.