Drop ceiling speaker brackets for in-ceiling installation in commercial facilities with paneled ceilings
For use with product ID 4103 (MST-660-2Y) and 4619 (MST-63-SK)
This product is not compatible with product ID 6034 (MST-6F-A)

Drop ceiling speaker brackets for in-ceiling installation in commercial facilities with paneled ceilings.. For use with product ID 4104 (MST-870-2Y). This product is not compatible with product ID 4929 (MST-825A).