Globe Marine DriveSaver&reg; Model 524Y Flexible Marine Drive Coupling for Yanmar & Kanzaki 120mm Flange Diameter, 4-Bolts, 10mm bolt diameter, 100mm bolt circle, 65mm pilot diameter, male/female configuration, 5-1/4" coupling diameter, 1" coupling thickness 675 ft/lb Engine Torque Rating Grade 8 Hardware, Made in the USA Fits Yanmar KBW20, KBW21, KH18, KM4A, KMH4A, YP-10M Fits Kanzaki KBW20, KBW21, KM4A, KMH4A