Features 1、0GA TO 4GA: This is a 0 to 4 amplifier input reducer, ideal for connecting power or ground cables, and is a great audio wire terminal block. 2、MAIN USE: This wire reducer can be used in most cars, which can effectively improve the sound quality and make the audio transmission better. 3、BRASS MATERIAL: These wire terminals are constructed of durable brass, which is resistant to deformation and durable. 4、WIDE APPLICATION: Wire reducers are suitable for amplifier connections, multi battery terminals, car audio music systems, multi amps, etc. 5、EASY INSTALLATION: The wire reducer is very simple to use, the connection is very efficient and safe, just install with hex screws. Specification Item Type: Amp Input Reducer Material: Brass Package List 4 x Amp Input Reducer 4 x Screw Sleeve 1 x Hex Wrench