303 Is An Adanced Self-Polishing Antifouling Formulated With Cuprous Oxide And Powerful Anti-Slime Agents. We Offer An Exceptional alue For Money, Making 303 The Ideal Choice For Long-Term Protection Of Boats Reaching Speeds Up To 35 Knots. Its Balanced Solubility Also Makes It Suitable For Boats That Remain Moored For Long Periods. Howeer, It Is Particularly Suitable For Boats Made Of Materials Other Than Aluminum. We Guarantee Reliable Protection For Up To 12 Months In Any Marine Situation. Choose 303 For Powerful And Long-Lasting Defense Against Unwanted Marine Growth.