The InSight Peep System is made up four main pieces including the light baffling Peep Housing, clarifying lens, Aperture, and Aperture Tool. There are 6 Aperture sizes ranging from 1/32" up to 5/32" as well as 4 different clarifier lens strengths to accommodate a wide range of shooting setups. The Peep Housing can be used with or without a clarifying lens and has two sets of string grooves to better accommodate a wider range of shooters. This is the InSight Standard Peep Kit WITH OUT Clarifiers