Switchcraft is a manufacturer of connectors, switches, jacks, plugs and other electronic components used in audio/visual, automotive, computing, medical, industrial and telecommunication applications. The 13037 part is a 1/4inch phone jack with a two-pole, two-wire (T/T) configuration. It is designed for use in instrument and hi-fi applications and is compatible with unbalanced input/output signals. Additionally, the part is equipped with an electrical ground terminal and comes with a mounting plate.