Laboware is presenting the product best in quality, RHEOSTAT COMES IN DIFFERENT RANGES: 10, 20, 30, 50, 100 etc. · Nichrome type, Bell terminal Continuous Constantine type. · Rheostat are used as series resistors or potentiometers. Open type slide wire type with a variety of resistance and current carrying capacity. Constantine wire is used as resistance. · Three 4mm standard terminals are provided. One at each end of the wire and the third at one end of the slider-rod thus the Rheostat can be used as potentiometer also. Resistance in ohms and current carrying capacities are marked on it. The end support are made of Bakelite. · A quality product from Laboware ideal for use in School Laboratories in developing countries of Asia, Africa and South America · Standard specifications for school laboratory use. Ideal mix of Quality and Economy. · Other configurations and superior quality available for specific use or for developed countries.