26BIN3NS05 up for sale is a nice working square neon tube removed from a old vintage neon wall clock this tube measures 15 3/4 x 15 3/4 outer size and has 12 MM neon glass tubing , electrodes are close together to go through the clock face , this is a original old tube and still has the union label on the tube , this lights up orange and appears to be a good working square neon tube for your project , also see our store for more neon tubes and neon clock parts we sell on eBay , thank you rwk