The Ametek 833450-57 is a pack of 2 replacement vacuum motor brushes for vacuum motors. Used to replace motor brushes when their length drops below 3/16 of an inch. Compatible with motor models 117473-01, 117470-07, 117470-12, 117474-12, 117478-12, 117500-12, 117500-13, 117503-12, 117549-07, 117549-12, 119792-00, and 119892-00. A genuine OEM part to ensure a proper fit and functionality.