Eisco has been designing, producing and supplying high quality lab equipment for education and industry since 1968. Eisco presents rheostats standard. The rheostats are wound with heavily oxidized resistance wire on a vitreous enamelled steel tube with the winding. The tube is supported on robust die cast end stands and the heavy duty sliding contact is of the multi-leaf phosphor bronze type, nickel-plated for corrosion resistance 4 mm. Terminal post are fitted, facilitating external connection conventional 4 mm. Plug