Blue Sea 2408 eight circuit terminal joint block

Screw terminal block made from Nylon with Nickel Plated Brass no 6 (M4) screws. The closed back design insulates power from the mounting surface 

Each opposing screw pair is one isolated circuit rated at 20 Amps and maximum of 300 Volts (AC or DC)

Accepts M4 ring terminals 

Jumpers can be used to combine single circuits into common circuits and can be found here