This is the ¼ Inch Mono Male to RCA Female Adapter. 1/4" mono plug features a heavy duty nickel-plated copper alloy tip, while it’s body is housed in a protective plastic casing. Solder terminals are tin electroplated for ease of soldering. ¼ inch is noticeably larger and is also quite common. It is typically used for analog signals, primarily audio. These connectors are commonly used on headphones, amplifiers, instruments, speakers, and much more. The ¼ inch mono male Solder Connector is a quick and easy solution for your audio projects. For more information on our products, you can give our customer service department a call at 888-519-9505. For all your cable and connector needs, choose Show Me Cables.