Magnifier with adjustable focus provide 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. Replacement battery Cat. No. 1111. Replacement bulb Cat. No. 8707. Magnification: 8 X. Small size. Diameter: 1-Inch. Not Illuminated. Control Company#: 3352.