NGK Plug Cap AES Plug Cord Set Plug Cap (Made by NGK Product): Compatible with screw types. *Please remove terminal nut type and install. Plug Cord (AES), Plug Cord Length: Approx. 19.7 inches (50 cm), Cord Thickness: 0.3 inches (7 mm) (equivalent to genuine product); There are cases where the cord will not fall out from the ignition coil. In that case, a cable joint is required. Compatible models: Zephyr 400/750,Z400FX,550FX,GPZ400F,Z400GP,GPZ550, GPZ750/F(ZX750A) XJ400/D,Z1-R,Z650(KZ650B/D),Z750FX/2/3