This diy injector cleaning adapter kit is easily to clean most car motorcycle fuel injectors. The package includes two white tubes and two crocodile clip charger cable to fit two different sized injectors. Power injector by 12v battery meanwhile cleaning liquid through the white tube, then through the injector to clean it. Requires fuel injection cleaner aerosol can (not included). It also requires 12 v dc battery power supply (not included). No compressed air needed.