Striping machines are used to paint lines on a variety of surfaces. They are commonly used on pavement to mark parking lots, roads and airports as well as on grass or dirt for sports fields. Striping machines basically consist of a small engine, an air compressor, the spray nozzle and a series of valves and hoses including one for paint intake. There is frequently a hose ranging from 25 to 50 feet on average that is attached to a separate spray gun similar to the kind found in spray painting equipment that is used for stencils or touch ups. Wheels, a handle and a trigger allow the operator to control the direction of the machine and the force of the paint spray. Most striping machines are pushed by the operator because that increases the amount of control and precision the operator has; self-propelled striping machines or ride-on striping machines are available for large areas. The frame is made from metal and is typically heavy duty stainless steel to resist harsh solvents and corrosion. Some models of striping machines have dashboards that light up for nighttime use. Centralized controls, filters, hose wraps and other accessories help facilitate high productivity for a fast and clean job. Striping machines are generally used by companies that specialize in laying asphalt, sealing cracks and other pavement issues rather than businesses that have paint machines or systems.