The 3310727.015 is a hard start assist capacitor kit by Dometic for specific Duo Therm AC units.
This motor starting capacitor has 7” lead wires and allows specific Dometic Air Conditioners to pull fewer amps on start.
Using this capacitor, a 2000W generator can start and run a 13,500 BTU Dometic Air conditioner. A 3000W generator can start and run a 15,000 BTU Dometic Air Conditioner with no issues. Pairing this capacitor to your air conditioner allows you to both buy a smaller generator and put less strain on your AC while starting it.