Kit Includes: Safe-Skeg, Mounting Hardware, Instructions, Allen Wrench and Loctite 262 Brilliantly Polished with a Seamless Design Contains a Drain Hole to Protect Against Corrosion and Freeze-Up For: Mercruiser Inboard/Outboard – Alpha 1 Generation II Drives, Years 1991 to Present Material Thickness: 1.5mm (50% Thicker than the Competition) Fit Type: Universal Fit