This document provides information about different brass instruments. It explains that brass instruments generally contain three main sections - a mouthpiece, tubing, and a bell. It distinguishes between larger and smaller mouthpieces used for different instruments. It notes that all brass instruments have valves except the trombone, which uses a slide. The four main brass instruments are described as the trumpet, French horn, tuba, and trombone. Additional details are provided about the characteristics of each. Other less common brass instruments are also briefly mentioned.