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Electrical Engineering and Electronic Installation Symbols Drawing Template Stencil - Engineering Drafting Supplies - Layout Plan Schematic Wiring. Dimensions: 230 x 130mm, Thickness: 1.2mm. Made from transparent, orange plastic. The rate of transparency allows to see the drawing medium below template for easy positioning. This electrical / electronic engineering stencil contains symbols of contacts, switches, rectifiers, capacitors, transformer coils, terminals, diodes, transistors, and many others. Ideal for students, teachers, engineers, useful when drawing diagrams, schematics, plans, layouts. High quality, brand new item supplied in original packaging.