1) Arabic musical instrument 2) Percussion instrument 
The mazhar (مظهر; plural mazāhar, مظاهر) is a large, heavy tambourine used in Arabic music. The mazhar`s frame is generally made out of wood. The instrument`s brass jingles are quite large (4-5 inches / 10–13 cm in diameter). It is played with a shaking technique that gives it a raucous sound. Its single head is considerably thicker .....
A large tambourine played in Egypt.
The mazhar is a very large tambourine.