The #1 lens (yellow dot on aperture) is a weak clarifier lens which can be used with any scope. The #2 lens (green dot on aperture) is a standard clarifier. This lens will usually work best with a 3, 4 or 6 power scope lens or larger. The #3 lens (red dot on aperture) is mainly used to clear up a high powered lens. All Super Peep Apertures will work with the Super Ball Peep Housing.Clarifier included.