Electrical and Electronic Installation Symbols Drawing Template Stencil &ndash; Engineering Drafting Supplies &ndash; Layout Plan Schematic Wiring Electrical Electronic Engineering Symbols Drawing Template Stencil Dimensions: 210 x 136mm, Thickness: 1.2mm. Made from transparent, light blue plastic. This electrical / electronic engineering stencil contains symbols of contacts, switches, rectifiers, capacitors, Ideal for students, teachers, engineers, useful when drawing diagrams, schematics, plans, layouts. High quality, brand new item supplied in original packaging.transformer coils, terminals, diodes, transistors, and many others. The rate of transparency allows to see the drawing medium below template for easy positioning.