303 Is An Adanced Self-Polishing Antifouling Formulated With Cuprous Oxide And Powerful Anti-Slime Agents. We Offer Exceptional alue For Money, Making 303 The Ideal Choice For Long-Term Protection Of essels Reaching Speeds Of Up To 35 Knots. Its Balanced Solubility Also Makes It Suitable For essels That Remain Moored For Long Periods. Howeer, It Is Most Suitable For essels 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.