The Gankogui, pronounced gon-KOE-gui, is also known as the agogo bell, double bell, or hi-low bell. This Ganlogui has an overall length of 13.5 inches. The low bell is 8.5 inches and the high bell is 4.5 inches. The Gankogui is an essential part of the drum circle keeping time and adding an overall drive or anchor point for the drumming. It is a very important part of traditional West African and Brazilian rhythm patterns. These Gankogui are hand hammered of iron. The high bell is pitched about a third up from the lower bell. This is another must have in the jam session and makes a world of difference in the overall sound of the session. These sizes produce the brightest voices which will stand out in the largest drum circle. A wood beater is included.