What's the difference between Kyoban Drums 418 and 420

The different models of Jingban drums have different diameters, and the diameter of the inner tang of the 420 plate drum is 60 millimeters, and the diameter of the inner tang of the 418 model is 56 millimeters.

Beijing Drum Class is the common name for traditional folk drumming in Fuzhou area, which is called Drummer Class or Wuyin Class in western Fujian. It is characterized by mainly blowing and beating music, the main instrument is suona, and the percussion instruments are drum plate, big gong, big cymbal, big drum, small drum, copper bell, small cymbal, bowl gong, cloud gong and so on.