Original replacement heads for Toca Freestyle 2 Djembes;Material: Synthetic fibre, white;Tuning system: mechanical;Compatible wit Freestyle Mech. Tuned Djembes (goatskin);Top:You can find the replacement head numbers on the sticker on the inside of the shell. Please watch out for correct size, material and tuning system.;Head determination by measuringAverage diameter [mm] (crown diameter/head overall diameter):9″ (243/267)10″ (254/284)12″ (290/317)14″ (354/384);