Description: High quality material, durable and safe. Scentific Laboratory 20 Ohms 20Amps Sliding Rheostat Variable Resistor for Physical Electrical Experiment Equipment. Great for school teaching tools and lab supplies. Material: Metal Size: Approx. 155x45x40mm/6x1.38x1.77x1.57 inches Package Includes: 1 Piece Sliding Rheostat
