These tow tractors have been a constant sight on US aircraft carrier decks for over 40 years. This particular model is the early variant that started to come into use in the 1960s and was replaced with the late variant in the late 1990s. You get 6 of the longer "huffer" type tractors and 4 of the shorter basic type tractors and 2 of the Fire Engine type. 12 tractors total!