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Steel wire close-wounded helix 20 mm diameter, closed length 3 meters extending to approx. 9 meters extended, with looped ends.
6pc Optical Lens Set, 2" (50mm) Diameter - 3 Double Convex Lens & 3 Double Concave Lens - 200mm, 300mm, 500mm Focal Lengths - Optically True Glass - Ground, Beveled Edges - Eisco Labs
KWD 6.500
Student Optics Kit - Light Box & 27 Optical Components - Eisco Labs
KWD 28
-26%
Optical Glass Lens Set - 3 Dbl Convex, 3 Dbl Concave, 38mm Dia - 20, 30, 50cm FL
KWD 7
Optical Glass Lens, 3" (75mm) - 200mm Focal Length - Ground, Beveled Edges - Use as Top Spinning Base - Eisco Labs
KWD 5
