Optical Glass Lens, 3" (75mm) - 200mm Focal Length - Ground, Beveled Edges - Use as Top Spinning Base - Eisco Labs industrial 75 INCHES Long and 5mm

75 INCHES Long and 5mm thickness

600 ENTRY LINES Perfect for any money planner

Package includes: 20 PCS

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Optical Glass Lens, 3" (75mm) - 200mm Focal Length - Ground, Beveled Edges - Use as Top Spinning Base - Eisco Labs industrial 75 INCHES Long and 5mmOptical Glass Lens, 3" (75mm) 200mm Focal Length Ground, Beveled Edges Use as Top Spinning Base Eisco Labs Product Features DOUBLE CONCAVE Highly polished, double concave lens SPHERICAL Lens measures 3" (75mm) in diameter and approximately 12mm thick 200MM FOCAL LENGTH Diverging lens with a 200mm focal length OPTICALLY WORKED GLASS Made of high quality, optically worked glass. Highly polished with beveled, ground edges GREAT FOR PHYSICS CLASSROOMS or