Made of optical quality glass, this 5" diameter 3X magnification attachment is easily installed on OttLite lamps. The arm extends from 16 to 30 inches and the head can be rotated 360 degrees for placement of the lens directly over the page. With OttLite, you’ll see every color accurately and detail clearly with reduced glare and eyestrain so you can do what you love, longer. SKU: A1310G