This part is commonly Used on models:
21323 Flex-Force Power System 60V MAX 21in Recycler Lawn Mower
21323T Flex-Force Power System 60V MAX 21in Recycler Lawn Mower
21326 Flex-Force Power System 60V MAX 21in Recycler Lawn Mower with SmartStow
21326T Flex-Force Power System 60V MAX 21in Recycler Lawn Mower with SmartStow
21327 Flex-Force Power System 60V MAX 21in Recycler Lawn Mower with SmartStow