With Light Baffle Technology in the 13 grain housing, you will eliminate all glare due to the aerospace anti-glare technology that produces a field of view with zero distortions. This housing is machined with both 37.5 and 45 degree string angles. This kit includes InSight Peep Housing, 6 apertures (1/32 Inch, 3/64 Inch, 1/16 Inch, 3/32 Inch, 1/8 Inch, 5/32 Inch), aperture installation tool and a protective case.