Check the listing for details. 100R-1K Ohm Wirewound Ceramic Potentiometer Variable Rheostat Resistor with Knob. Condition: New. Listed at 29.28 USD. Specification:Product Name: Wirewound Ceramic Potentiometer Material：Ceramic MetalResistance Value: 100R 150R 200R 500R 1K OhmPower：25W 50W 100W 150W 200WTolerance: +/-5%Terminals Number: 3Features: Round ShaftScrew Thread Dia.: 10mm / 0.39 inchShaft Diameter: 6mm / 0.23 inchShaft Length(do not include the Screw Thread parts): 15.7mm / 0.62 inchShaft Total Length：32mm / 1.26 inchKnobs Size: 18.8 x 30 / 0.74 x 1.18 inch (H*D)Features:3 Terminals, Single Linear, Suits Most Standard Knobs.（this item include Knobs)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.