The Byomic Reading Bar with Reading Line BYO-LL2510 2,5x210mm is a universal reading magnifier equipped with an integrated straight blue line and high power spot lens. With the help of this blue line you can place the ruler directly under a line. The ruler has a 2.5x magnification and is also equipped with a small loupe with 5x magnification (15mm). The lens of this handy magnifier is made of acrylic. Unlike a glass, acrylic is lighter in weight and has a higher scratch resistance.