Description Description: Fit for Yamaha 9.9 HP 15 HP 6B4 Outboard 2 Strokes Engines. This is a brand new aftermarket/replacement ignition coil assy. Made of high quality plastic material for long lasting durability. A perfect replacement for your old or broken one. Easy to install, No installation instruction. Specification: Material: Plastic Wire 1 Length: 15 cm / 5.91 inch Wire 2 Length: 11 cm / 4.33 inch Diameter of Screw Hole: 5 mm / 0.20 inch Screw Holes Spacing: 6 cm / 2.36 inch Outer Diameter of Red Hole: 25 mm / 0.98 inch Inner Diameter of Red Hole: 10 mm / 0.39 inch Package Includes: 1 Set Motorcycle Ignition Coil Assy : Please allow slightly difference 1-3mm due to manual measurement. Please make sure that the part youre replacing is the same as the picture shown before purchasing. Thank you.