engineering plastic shapes, namely, extruded or compression-molded plastic in the form of bars, blocks, rods, sheets and tubes for use in manufacturing

fuses

electrical, electronic and opto-electric devices and apparatus; namely, surge protection devices, voltage regulators, voltage limiters, suppressors, transient voltage suppressors, surge arrestors, protection networks, diodes, thyristors, transistors, resistors, varistors, rectifiers, bridges, bridge rectifiers and gas discharge tubes