Doepfer A100 busboard.
NOW V6  WITH 22 x  SHROUDED HEADERS
(photo is of old v5)
22 no. standard Eurorack Modular Synthesiser 16 pin headers.
Has 3 LED lights to indicate when +12v , -12V and + 5V voltage is running.
Passive.

Dimensions 42mm x 390mm  in plan so  will fit 80hp cases and upwards.

Can also be bought from SynthRacks as part of the DIY A100 power kit  or used with the Doepfer PS3 power supply or many other power supplies to distribute power and connect your modules.
Mounting hardware not included.
Supplied with 4  connection wires.