All hand-hammered , made exclusively for SONOR by a traditional Turkish Cymbal company, are of B20 Bronze (a mix of 80% Copper and 20% Tin). The total production process is comprised of traditional handcrafted methods. After melting and tempering the B20 Bronze, it is rolled into discs then hammered and polished. The intensive hammering process and precise, two-sided lathing method elevate the standard of outstanding performance and value.