It appear to be cast iron, with cast aluminum end plates and brass contacts. Bench tested, it runs well on 6 to 12 volts DC. If you have any questions please do not hesitate to ask. All items are well packed. The item "Vintage Toy Electric Motor / Steam Engine Generator Ajax, Knapp Votamp, K&D" is in sale since Saturday, August 31, 2019.This item is in the category "Toys & Hobbies\Vintage & Antique Toys\Other Vintage & Antique Toys". The seller is "frilen2" and is located in Richmond, Illinois. This item can be shipped worldwide.