Latin Percussion LP263AE Bongo Head Tri-center - 7.25"Evans Tri Center heads are made of a polyester base that prevents detuning caused by humidity. The tri centered dot in the center of the head eliminates unwanted overtones, and also adds weight to the center of the head, giving it a lower fundamental tone. The laser cut collar is designed to give you a proper fit and helps with even tuning. The head also feels similar to the rawhide versions because of a micro textured finish. This is the perfect head