You have an existing old Bellsouth 100 Egg Incubator and the gearbox is not turning (not a drive disk motor). Includes power supply and plastic floor with cog track. If you have a wire floor, purchase a perforated steel new floor also (B100NEWFLOOR).
This will upgrade a semi automatic old style without cob in the turning floor to a new style Automatic turner.
If you have a turning floor with moulded cog in it, then you may only need B100GBO