Specialty Archery Iron I Rifle Peep Aperture 0.148in 1502633. 148" offers the widest aperture size in the Iron I system delivering maximum field of view while still maintaining sight clarity and focus. Perfect for shooters needing enhanced visibility or light transmission it features Optical Centered Technology (OCT) for precise verifier alignment along with Protected Lens Technology (PLT) and Tool-less Aperture Technology (TAP) for easy tool-free handling. Designed exclusively for the Iron I Peep Housing (sold separately) this aperture is ideal for a broad range of shooting conditions where a larger sight picture is beneficial. Specifications for Specialty Archery Specialty Iron I Rifle Peep Aperture 1502633: 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: 0.148" Requires Iron I Peep Housing (sold separately) Optical Centered Technology (OCT) enhances verifier lens alignment Protected Lens Technology (PLT) reduces risk of cracking Tool-less Aperture Technology (TAP) allows quick no-tool installation Easily removable for cleaning or verifier changes Compatible with Iron I optional verifier lenses 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