The combination of a 5" diameter, 3-diopter (3/4x magnification) lens with a 22-watt circline fluorescent lamp provides 360° of shadow-free light around object being inspected. Focal length is 13" . Comes standard with spring-balanced arm, on/off switch, 3-wire cord, and 22-watt circline fluorescent tube. Available with weighted base (25" reach) or clamp-on mount (45" reach). Optional 3-diopter snap-on lens increases magnification by 75%. Color: Gray.