The TRUGLO Centra Peep Pro-Series 3/16 Sight (Red) is a lightweight machined aluminum design. The angled design allows for perfect peep alignment. The 3/16" aperture diameter does not require and tubing. Features: - Lightweight aluminum construction - Precision CNC-machined - Angled design for shorter axle-to-axle bows - Aperture diameter is 3/16" Specifications: - Construction: Aluminum - Aperture Diameter: 3/16"