The 5X lens with 2-1/8 in. dia. viewing area works well for basic magnification, while the 3/4 in. lens with 8X power is ideal for providing extra detail while remaining separate from the main lens. The Dual Lens Magnifier is a must for your classroom science corner, or have it at the ready so kids can examine various critters, rocks, feathers, and plants during their next field trip. Features durable plastic body with two glass lenses. 6-1/4 in. L.