The Claas 7700039039 is an original equipment manufacturer (OEM) fuel tank cap designed for a wide range of Claas agricultural and construction machinery. This black plastic cap ensures a secure seal for fuel tanks on models including ARION, AXION, ATOS, ELIOS, NEXOS, LEXION, TUCANO, AVERO, JAGUAR, SCORPION, and TORION series. It features an outer diameter of 80 mm, an inner diameter of 50 mm, and a height of 50 mm, providing a reliable replacement for damaged or lost caps.