The cast aluminum over 5 pounds. I believe these were later re-manufactured by Virginia Metal Crafters. The item "PAIR VINTAGE CAST IRON DUCKS R. MCB FOUNDRY TAG NAUGHTY NICE ALUMINUM DOORSTOP" is in sale since Sunday, September 17, 2017.This item is in the category "Antiques\Decorative Arts\Metalware". The seller is "moltar227" and is located in Youngstown, Ohio. 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, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Dominican republic, El salvador, Bahamas, Viet nam, Uruguay.