Product Name: Rheostat Control the electrical resistance of a circuit without interrupting the flow of current. The rheostat consists of a ceramic core and a resistive wire wound into a toroidal coil with a wiper axle. Suitable for use as light dimmers and motor speed controls, applicable for arcs, pumps, fans, blowers, respirators, dental equipment, model trains, and other applications requiring high voltage and current. Material: Ceramic, Metal Color: As shown Power Rating: 100 W Resistance Value: 100 Ohm Mounting Hole Diameter: 9.5mm / 0.37in Bottom Screw Diameter: 2.5mm / 0.1in Bottom Base Diameter: 72mm / 2.8in Shaft Size: 37 x 6mm / 1.5in x 0.24in (L*D) Body Size: 80 x 36mm / 3.15in x 1.42in (Max.D*T) Net Weight: 250g Package Content: 1 x Rheostat Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3cm.