Specifications:Rheostat has good dissipation, high stability and long life-span.It is very suitable for school teaching tools and laboratory supplies.Made of premium material with fine workmanship, it is durable and safe.Children will learn the principle of 200 1.25A sliding rheostat variable resistor.Sliding rheostats are widely used in power supply, transducer, elevator, arena audio and demanding equipment industries.Item Name: RheostatMaterial: MetalType: 5, 10, 20, 50, 200Current: 5: 3A, 10: 2A, 20: 2A, 50: 1.5A, 200: 1.25AFeatures: Durable, Adjustable Resistance, Easy to Use5 Size: 16.5cm x 5.5cm x 3.5cm/6.5" x 2.17" x 1.38" (Approx.)10 Size: 16.5cm x 5.5cm x 3.5cm/6.5" x 2.17" x 1.38" (Approx.)20 Size: 16.5cm x 5.5cm x 3.5cm/6.5" x 2.17" x 1.38" (Approx.)50 Size: 17cm x 5.5cm x 5cm/6.69" x 2.17" x 1.97" (Approx.)200 Size: 21cm x 9cm x 5cm/8.27" x 3.54" x 1.97" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Rheostat