Both cylinders function when the crankshaft is turned. It is brass and nickel plated. MOST OF THE ITEMS I SELL ARE LISTED ON MULTIPLE SITES AND/OR AT THE ANTIQUE MALL FOR SALE.The item "Early 1900's Miniature Vertical 2 Cylinder Marine Boat Steam Engine Motor Model" is in sale since Friday, June 16, 2017. This item is in the category "Toys & Hobbies\Models & Kits\Tools, Supplies & Engines". The seller is "lee_vintagecoolstuff" and is located in Grand Blanc, Michigan. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Colombia, Panama, Jamaica.