Gator Guards KeelShield Keel Protector Keel protector kit comes ready to install with strongest, thickest 3M marine adhesive available, Guaranteed to last the lifetime of your boat Easy, Do It Yourself Installation - just Prep-Peel-Stick, Installation does not require time to cure Works on fiberglass and most aluminum boats; (See www.gator-guards.com for list) 100% Made in the USA - Strongest and most durable protection for boat keel from abrasions, scratches, and scars 5" width, made of pure Urethane Polymers and available in 9 colors and sizes 5', 6', 7', 8', 9', 10', 11', 12'