Date First Available :November 2, 2011 Manufacturer :Alleima ASIN :B0BN6ML83J Country of Origin :USA 500 Foot Tetrode Wire with Easy Bond XTC by Alleima in Palm Coast, FL. Tetrode Wire commonly used for nerve stimulation research, and making electrodes. Alloy: Nickel-Chrome aka Nixr, RO800, Redi Ohm 800 Size (diameter): 55.5 AWG, 0.0005", 0.012 mm