The Evolution of the Revolution! The latest patented breakthrough, the FX Series™ Sonic Enhancement Ports produce a clearer and more focused note that dramatically improves the projection of the natural tone of your drum. These revolutionary ports are the result of more than 3 years of research and development and deliver an incredible three-dimensional sound in all live performance and recording environments. Like all of our products, FX Series™ Sound Ports are compatible with your favorite brands, sizes, and styles of drums and heads. FX Ports are also compatible with all drum microphones. Suitable for Bass Drum. Colour: Black