Timpani
A timpani drumhead, also called a timpani head, can be made out of two different things. Some are made out of animal skin, like calfskin or goatskin. Other ones can be made out of thick plastic. Because plastic heads are hard to break and do not cost as much as animal skin heads, they are used more often than animal skin heads. However, a lot of professional players prefer skin heads because they think that skin heads make a better sound when they are hit. The drumhead is stretched over the bowl of the timpani and held on by screws for tuning the timpani.