This 3.5-meter studio headphone cable from Fostex can be used as a replacement cable for the Fostex RPmk3 headphones. It is also compatible with the T50RP, T40RPmk2, and T20RPmk2. Black, 3.5mm, male to male. Founded in 1973, Fostex is an acclaimed manufacturer of location sound, multi-track recording, and speaker products.