Product Name : Rheostat; Material : Ceramic, Metal Power Rating : 50 W; Resistance Value : 10 Ohm Mounted Hole Dia : 9.5mm/ 0.37" Bottom Screw Diameter : 3mm/ 0.12"; Bottom Base Diameter : 57mm/ 2.3" Shaft Size : 40 x 6mm/ 1.6" x 0.24"(L*D); Body Size : 63 x 35mm/ 2.5" x 1.4" (Max. D*T) Package Content : 1 x Rheostat Color : Net Weight : 160g 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 , pumps, fans and blowers, respirators, dental and model trains or other applications that require high voltage and current. Note:Light and different displays may cause the color of the item in the a little different from the real thing.The measurement allowed error is +/-1-3 cm.