Model TG4102B 4 pin (3 x .029 dia.) with green TFO pin (.040 dia.) Smaller version of the award-winning TRU-SITE XTREME SERIES Extra-long protected wrapped fibers. Precision pin alignment eliminates distortion. Lightweight composite pin guard. Aperture has a 1.6" inner diameter. 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 handed shooters. Three sets of markings for elevation windage and pin adjustments. TG4102B Comes with green TFO pin. TG4111B Comes with light.