Product Name: Rheostat; Material: Ceramic, Metal Power: 50 W; Resistance Value: 10 Ohm Mounting Hole Diameter: 9.5 mm / 0.37 inch; Bottom Screw Diameter: 3 mm / 0.12 inch; Bottom Base Diameter: 57 mm / 2.3 inch Shaft Size: 40 x 6 mm / 1.6 inch x 0.24 inch (L*D); Body Size: 63 x 35 mm / 2.5 inch x 1.4 inch (Max. D*T) Package Contents: 1 x Rheostat Color: As Shown Net Weight: 160g Allows you to control electrical resistance in a circuit without interrupting the flow of current. The rheostat consists of a ceramic core and a resistive wire wound to form a ring-shaped coil with a wiper shaft. Widely used as a light dimmer and motor speed regulator, applicable for arc lamps, pumps, fans and blowers, respirators, dental and model trains, or other applications requiring high voltage and current. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.