Extra-long, protected, wrapped fibers. Precision pin alignment eliminates dis- tortion. Lightweight composite pin guard. Aperture has a 2" inner diameter. Large circular field of view. Glow-in-the-dark shooter"s ring helps align peep sight. Level with two vertical bars. Reversible bracket for greater vertical adjustability. Adjustable for left and right hand shoot- ers. Three sets of markings for elevation, windage and pin adjustments. Available with a light or TFO (green) pin. Lighted models are designed to reduce unwanted pin glare. Color: Black. Replacement Battery - TG988C