This is a high-performance, replaceable carbon brush for electric vacuum motors. The brush is retractable, and replacing it with a new one can restore the motor's electric braking function. Fits but not limited to the following Ametek Lamb motors:115923-AA, 115923, 115923-C, 116392-03, 116432-00, 116471-00, 116471-07, 116471-13, 116472, 116472-00, 116472-13, 116472-18, 116472-29, 116472-39, 116474-00, 116474-37, 116565, 116565-00, 116474-37, 16565-13, 116565-29, 116566-00, 116566-13, 116600-44, 116658-13, 116662-49, 116698-13, 116753-13, 116754-13, 116763-13, 116764-00, 116764-13, 116845-00, 116909-13, 116973-13, 117073-00, 117073-37, 117111-00, 117160-13, 117468-00, 117760-00, 117923.