The surdo (pronounced zerdoo) is a large bass drum used for playing the lower parts of the percussion section. It often comes in three different sizes or tones. These can be referred to as the low/mid/high or the 1/2/3 respectively.
Often know as the Brazilian snare this drum differs from a standard snare drum by being played with the snare on top, rather than underneath. Usually played with drumsticks, it is easily identifiable by its powerful, staccato sound.
The repinique is a two headed drum often used to lead a bateria - tuned high to cut through the rest of the music. It can be played using a combination of a short wooden stick and a hand or with long whip sticks.
A two-toned bell, played with a single wooden stick , used to create sometimes complicated multi-tonal patterns. Makes up part of the 'cutlery' section of the bateria.
A small, round drum, often only 6" in diameter. Tuned tightly to produce a loud, sharp sound it can be played using a wooden stick or a beater consisting of several nylon threads. A variety of different strokes can be used to produce varying sounds.