You couldn't build an entire jet just from Esterline Technologies products, but it would hard to fly one without them. The aerospace company's offerings extend from the cockpit to electrical subsystems to materials inside and outside aircraft. It make avionics that control and communicate, sensors and power switching devices that monitor conditions, and materials necessary for commercial and military aircraft. Esterline, with $1.7 billion in sales, sells mostly to the US government, particularly the Department of Defense, and aircraft manufacturers. There can be as much as $1 million worth of Esterline products in jet fighters and airliners. About a fifth of sales come from high-end non-aerospace products.