Check the listing for details. 1 Strong USA Made 12AT7 Tube - Assorted USA Brands - AMPS. Condition: Used. Listed at 11.24 USD. You are buying a: Strong USA Made 12AT7 Tube Made in USA - Assorted USA branded tubes STRONG TUBES AT: 95%+ / 95%+MINIMUM reading is 70% , NEW (NOS) reading is 100%+ and MAX reading is 130%All tubes are tested for filament, leakage, Dynamic Mutual Conductance and emission valueAlso tested and worked good in our equipment with NO MICROPHONICS or SHORTSTubes passed ALL testsSold as is as Pictured as Described Please leave 5-star eBay Feedback! This is very important! We strive to make this happen! We fix all problems, please contact before leaving any feedback to let us fix the problem! We want all buyers satisfied! All orders are shipped within 1 business day of payment clearing! Check out my other items! Be sure to add me to your favorites list! Please Do Not Leave Any Kind of Negative Feedback Without First Contacting Us, We Will Fix Any Problem If There Ever Is Any. Thank You and Good Luck! Please email with any questions.1IB0A8C