Single-skin double-conical drums
Sets of drums with tubular bodies that have a larger diameter at the middle than at the ends. The drum bodies are rectilinear, with an angular profile. Each drum body is enclosed at one end by a single tightly stretched membrane, and the opposite end is open. The membranes are directly struck by the player using the hands or intermediate devices such as sticks.
Sets of single-skin double-conical drums
Hornbostel - Sachs