Kickport's FX Series™ Sonic Enhancement Ports produce a clearer and more focused resonant note that dramatically improves the projection of the natural tone of your drum. The result of more than 3 years of research and development, these patented accessories also reduce unwanted overtones, enhance resonance and deliver an incredible three-dimensional sound in all environments. Like all Kickport products, FX Series™ Sound Ports are compatible with your favorite brands, sizes, and styles of drums, heads; plus, compatibility with all of your drum microphones. This 1" insert is intended for mounted toms.