This kit gives you 6 different aperture sizes to allow you to fine tune and get optimal performance in all lighting circumstances. Simply screw in and out to find the size that fits your shooting style. This kit includes 6 apertures (1/32?,3/64?,1/16?,3/32?,1/8?,5/32?), aperture installation tool, protective case. Hamskea InSight 6 Aperture Set (1/32", 3/64, 1/16", 3/32", 1/8", 5/32, Tool, Case) PEEP050