Specialty Archery Iron I Rifle Peep Aperture 1/32in 1502628. Built for precision shooters this aperture is part of the Iron I system and must be paired with the Iron I Peep Housing (sold separately). Featuring Optical Centered Technology (OCT) for improved lens centration and Protected Lens Technology (PLT) for durability it also incorporates Tool-less Aperture Technology (TAP) for quick and easy adjustments. Each aperture is lightweight easy to clean and engineered to boost accuracy for iron sight shooters. Specifications for Specialty Archery Specialty Iron I Rifle Peep Aperture: Manufacturer: Specialty Archery Rear Sight Color: Black Color: Black Illumination Type: Non-Illuminated Sight Position: Rear Illumination Color: None Features of Specialty Archery Specialty Iron I Rifle Peep Aperture: Aperture size: 1/32" (.031") Compatible only with Iron I Peep Housing (sold separately) Optical Centered Technology (OCT) enhances verifier lens alignment Protected Lens Technology (PLT) prevents lens cracking Tool-less Aperture Technology (TAP) for wrench-free adjustments Easy to remove for cleaning or verifier changes Optional verifier lenses improve pin or sight clarity Aperture weight: 8.2 grains Fits Williams Lyman and Skinner threaded peep sights (Iron I only) Package Contents: Specialty Archery Specialty Iron I Rifle Peep Aperture