The Ametek 33423-12 is a replacement brush for vacuum motors. Used to replace motor brushes when their length drops below 3/16 of an inch. Compatible with motor model 117123-00, 117123-07, 117123-13, 117123-29, 117123-35, 117944-00, 119678-00, and 119709-00. A genuine OEM Ametek part. Ensures a proper fit and functionality.