This model kit is in 1/700 scale. The single sprue is connected by wires at the rear of the amphibious trucks. It includes: 6x DUWK amphibious trucks.
According to Wikipedia: "The DUKW (colloquially known as Duck) is a six-wheel-drive modification of the 2-ton capacity "deuce" trucks used by the U.S. military in World War II amphibious truck, designed by a partnership under military auspices of Sparkman & Stephens and General Motors Corporation (GMC) for transporting goods and troops over land and water, and approaching and crossing beaches in amphibious attacks. Designed only to last long enough to meet the demands of combat, DUKWs were later used as tourist craft in marine environments."