Circuit Board, suits AstroVac and Electron Ducted Vacuum Systems.

Note:

• ASTROVAC: suits all AstroVac power units manufactured after January 2005 (serial number 05 01 XXXXX onwards). Units made prior to Jan 2005 need a new housing to go with this current circuit board.
• ELECTRON: suits all Electron power units with plastic housing/casing. This newer circuit board also replaces smaller (older) Electron board.