Product Name: Wirewound Ceramic Potentiometer Resistance Value: 200R ohm Power:150W Tolerance: +/-5% Terminals Number: 3 Features: Round Shaft Total Size: 104.7 x 80mm/ 4.12x 3.15 inch (D * H) Screw Thread Dia.: 10mm/0.39 inch Shaft Diameter: 6mm/0.23 inch Shaft Length(do not include the Screw Thread parts): 15.7mm/0.62 inch Shaft Total Length:32mm/1.26 inch Package Content: 1 x Wirewound Ceramic Potentiometer Knobs Size: 18.8 x 30/ 0.74 x 1.18 inch (H*D) 200R ohm, 3 Terminals, Single Linear, Suits Most Standard Knobs.(this item include Knobs) Material:Ceramic Metal Control the electrical resistance of a circuit without interrupting the flow of current. The rheostat is consisted of ceramic core and a resistive wire wrapped to form a toroid coil with a wiper axle. Can be used widely as light dimmers and motor speed control, is applicable for arc lamps, pumps, fans and blowers,, model trains or other applications that require high voltage and current. Knurled shaft with split design for push-on knob.