32 OZ, Hull Cleaner, Does Not Contain Harmful Acids, Safe & Easy To Use, Quickly Removes Stains From Water Line, Excellent For Use On Fiberglass, Metal & Painted Surfaces, Cleans Scum Lines & Stains On Boat Hulls Easily & Effortlessly, Safe For Use On Fiberglass & Painted Surfaces, Instantly Removes Stains From Grassy Marine Growth, Rust, Scum Line, Fish Blood Etc, No Rubbing Or Scrubbing.