Two small gourds filled with seeds, connected by a string. These originate in West Africa (the supplier we work with imports theirs from Ghana) and go by many names: tellavi, televi, asalato, aslatua, kashaka, cas cas and more. A deceptively simple percussion instrument that can get quite complicated with impressive technique! See the video for an example of a master player.
Sizes vary. The string length averages about 3.5-4".
By nature of the material they are made of, these are fragile instruments. You'll want to monitor your amount of "force" when playing them as the two gourds strike each other. Some people order multiples to have a backup on hand.