Tru-Glo TRU-SITE Extreme with light. Tool-less design. Extra long, protected, wrapped fibers. Aiming dots are aligned on the same place to eliminate distortion. Large round circular field of vision. One piece head reduces vibration. Apertures has a 2" inner diameter. Glow-in-dark shooter's ring helps align peep sight. Adjustable red level with two vertical bars. Level is illuminated by luminescent shooter's ring. Reversible bracket for greater vertical adjustability. Adjustable for left and right handed shooters. Three sets of markings for elevation, windage and pin adjustments. Lighted models are designed to reduce unwanted glare. 5 .029 Fiber Optic Pins. Color: black. Tru-Glo TRU SITE Extreme with Light.