The main drum is called a tabla or dayan and is played with the dominant hand. Its shell is cylindrical and made out of wood, and its tight skin produces a distinct pitch when struck. The larger, low pitched drum, called bayan, has a bowl-shaped metal shell. Its membrane is looser than that of the tabla, enabling the player to manipulate the drum's pitch with his or her hand in performance.
 
Case: 58 CM. x 34 CM. x 33 CM.
Big Brass Bayan (Bass): Surface = 22 CM. To 23 CM.,
Height = 27 CM. To 29 CM.
Wooden Dayan (treble): Surface = 12 CM. To 14 CM.,
Height = 25 CM. To 26 CM.