Only the finest clear crown optical lenses are used for true color rendition and less distortion. 5" double convex lenses, 13" focal length, 3 diopter power provides 75% magnification. Great for reading and stitching! Circular fluorescent tube provides an even field of illumination because light rays flood all sides. Use as a free-standing model with purchase of a pedestal or wheel-base floor stand. Includes tube. Please note that this item uses 120v AC only. Please note, an additional shipping charge of $6.00 will be added to this item due to size and weight. For orders sent to Guam, Puerto Rico, Alaska, Hawaii and foreign countries we reserve the right to bill for actual shipping charges.