Welcome!... Available for auction are (2) two Phantom Motors, and (1) one HI SPEED Brand of engines for parts and repair. Need cleaned and lubrication. Sizes are not marked on the engines. My guess would be around a .23?The one Phantom motor has a stamp on the case U256, Which would have been from the Bruce Underwood Collection. I has a few of his engines on my last auction. These are a few of his misc. one's. Thanks & God Bless!....Stan