Pneumatic fittings are components used to connect different sections of pneumatic systems together. They are designed to provide a secure and leak-free connection between tubes or hoses, allowing compressed air to flow through the system without any loss of pressure. Pneumatic tubing, on the other hand, is used to transport compressed air from one point to another within the pneumatic system. It is typically made of lightweight materials such as polyurethane or nylon and is available in a variety of sizes and lengths to accommodate different applications. Pneumatic tubing is designed to withstand the high pressures and rapid changes in pressure that are typical in pneumatic systems.