The klong thap (Thai: กลองทับ, pronounced [klɔːŋ tʰáp]) is a goblet-shaped drum used for providing the changes of rhythm and also for supporting rhythm of the Nora (Southern dance drama).
Its length is about 40-50 centimeters.
The body is made from heartwood of a jackfruit tree that has been carved into a goblet shape.
A single drumhead is a thin leather membrane made from langur skin or cat skin, which is attached to the body by cloth strings or rattan strings.
The klong thap is almost always played in a pair, with one slightly lower in pitch called luk thoeng and one slightly higher in pitch called luk chap.