Rheostat Features: Rheostat 10 inch (50 ohm 2.3 Amp.) Great classroom demonstration tool Excellent for providing hands on understanding Ni Chrome & Eureka wire is wound on vitreous enameled tube Sliding contact carriage, mounted on the slide bar, carries a phosphor bronze contact for long life Best Price, Best Quality, Fast & Free Shipping Packed in Printed cardboard box Part Number: KTN292