Piper Coaxial Plug Jumper Cables for socket with single male center pin. Made by Associated Equipment Aircraft Jumper Cables are made from heavy duty #4 multi-strand copper cable. Tested in temperatures down to 50° below zero. 500 amp clamps are spring loaded to prevent slip-off. Plastic coated to eliminate arcing or sparks. 15 foot cables make excessive maneuvering of source battery unnecessary.