The control line is used to control the plane. The line is held by the handle and connected to a leadout wire SULP2945 OR SULP2946. The size of the engine determines which wire lead is to be used. PACKAGE INCLUDES: 1- Control line (54 feet) COMMENTS: The white dacron line comes on a bobbin type spool. Customer will need to purchase the handle and wire separately. 4-22-94sk