This Control Company illuminated dual magnifier provides an in-focus and highly defined view of surface details, illuminating uniformly over the field of observation. High-powered magnification has universal application for precise scientific, plant, and fieldwork. Illuminated magnifiers are supplied with AA replaceable batteries. Replacement battery Cat. No. 1111. Replacement bulb Cat. No. 8707. Maginfication: 3 x with 10 x. Medium size. Window: 1-3/4 x 1-3/4-Inch. Control Company#: 3351.