Tee barb fittings are used to combine (or divide) fluid flow through flexible hose, tubing pieces or other hydraulic components that connect to pipes. It is available with female thread sockets, solvent-weld sockets or opposed solvent-weld sockets and a female-threaded side outlet. Tees can connect pipes of different diameters or change the direction of a pipe run. Available in a variety of materials, sizes and finishes, they are used to transport two-fluid mixtures to other pneumatic components. Tees may be equal or unequal in size, with equal tee barb fittings being the most common.