Specialty Archery Iron I Rifle Peep Aperture Kit Contains all 6 Apertures 1502625. This comprehensive kit includes all six Iron I aperture sizes?ranging from 1/32" to .148"?along with a dedicated storage case for convenient organization. Each aperture features Optical Centered Technology (OCT) Protected Lens Technology (PLT) and Tool-less Aperture Technology (TAP) to provide superior performance quick changes and enhanced durability. Designed exclusively for use with the Iron I Peep Housing (sold separately) this kit allows shooters to adapt to any lighting or shooting condition with unmatched clarity and accuracy. Specifications for Specialty Archery Specialty Iron I Rifle Peep Aperture Kit: Manufacturer: Specialty Archery Color: Black Features of Specialty Archery Specialty Iron I Rifle Peep Aperture Kit: Includes six Iron I apertures: 1/32" (.031") 3/64" (.046") 1/16" (.063") 3/32" (.094") 1/8" (.125") .148" Comes with protective storage case Requires Iron I Peep Housing (sold separately) Optical Centered Technology (OCT) for precise verifier lens alignment Protected Lens Technology (PLT) prevents lens cracking Tool-less Aperture Technology (TAP) for fast easy adjustments Easy removal for cleaning and verifier replacement Aperture weight: 8.2 grains each Compatible with Williams Lyman and Skinner threaded peep sights (Iron I only) Package Contents: Specialty Archery Specialty Iron I Rifle Peep Aperture Kit