This is a Rectify Series drop-in speaker system for both current-run Walthers Proto F-unit locomotives. For the current-run Walthers Mainline and sound-ready P2K F-units, use WLML-F701-RC1.
The speaker uses the factory mounting screws and no modifications are needed to replace the factory speaker.
The speaker comes fully assembled and tested.
Dimension: 23mmH x 27mmW x 49mmL