Specifically designed for use with a Korbanth Graflex Supreme/89 Sabers hilt with The Custom Saber Shop’s MHS V1 Tier 2 RGB Electronics Kit. You'll have to remove (unscrew) the mid-chassis that comes with the hilt to be able to fit this chassis. LED emitter goes in the end with the wire slot for the activation switch. I cut out my own "O" shaped felt gasket to place between the speaker end of the chassis and the Graflex pommel for a no rattle installation.