Ultra-40 Blue 7mm Leade Set MO73537Ultra 40 Blue 7mm Leade SetSuit GM LS Series 9. 75" Lead Length MO73537 73537 Exterior sleeving offers improved dielectric strength for added resistance to outside pulses while electrical protecting wire against heat, chafing and contaminants 8. 65mm diameter wire with 40 ohms of resistance per foot Sleeving adds extra dielectric strength which is wires ability to not be affected by outside electrical pulses Sleeving extends spark plug wire life and