The IN-1 is a larger nixie; digit height is 12mm and the tube has a diameter of 30mm and a height of 60mm. The tube's unusual 11 pin phenolic base is practically impossible to find a socket for, though the truly desperate can repurpose Molex pins from an ATX power supply to act as a socket stand-in. IN-1 is a cold cathode neon gas indicator displays digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Indicating current (no more than): 2.5mA. Keep-up voltage (no more than): 150V.Firing voltage (no more than): 200V. Length of the tube (without pins): 60mm. Diameter of the tube: 30mm. Symbol size: 0.74"x0.4" (18 x 10 mm). The item "Box of IN-1 nixie tubes vintage indicators for DIY project or CLOCK NOS" is in sale since Tuesday, October 12, 2021. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "vannadiy" and is located in Vinnitsa, Vinnitskaya obl.. This item can be shipped worldwide.