This part is commonly Used on models:
39901 Flex-Force Power System 60V MAX Snowthrower
39901T Flex-Force Power System 60V MAX Snowthrower
39902 Flex-Force Power System 60V MAX Snowthrower
31853T Flex-Force Power System 60V MAX Snowthrower
39921 21in Power Clear Flex-Force Power System 60V MAX Snowthrower
39921T 21in Power Clear Flex-Force Power System 60V MAX Snowthrower
39922T 21in Power Clear Flex-Force Power System 60V MAX Commercial Snowthrower