Constructed of kiln dried, Siam Oak Hand seIected rawhide heads Standard 71⁄4' and 85⁄8' diameter natural rawhide heads, hand-picked for quality More pronounced shell contour than other bongos to create crisp, distinct high tones Specially designed steel backing plate helps to prevent cracks from occurring in the shell when players in the Salsa genre drop their bongos to the floor and begin playing their bongo cowbell Traditional or LP Comfort Curve II Rims 5⁄16' diameter tuning lugs have been carefully formed to hug the shell making them as comfortable for playing as possible Plated, cast aluminum bottoms