4 Bottles of RR2 Rid O' Rust Extreme Water 2X Concentration Stain Preventer,1/2-Gallon Bottle Each Limited Stock Order Today!Product Description:• New 2X formula is twice as strong as original Rid O' Rust formulas • Prevents ugly rust stains and scaling from well water • Use in place of Rid O' Rust Formula 1000 and Formula 3000 • No.1 Selling rust preventer in the US• Rid O' Rust RR2 Extreme Water Formula Stain Preventer, 1 case of 4 - 1/2 gallon bottles. Use Rid O' Rust RR2 rust stain preventer to prevent UGLY rust stains caused by irrigation well water. • Apply the formula through American Hydro Systems injection or siphoning system to prevent sprinkler stains from well water forever. • RR2 is used for water with low and fluctuating pH and any hardness. 1/2 gallon 64 Oz. of RR2 will treat 125,000 gallons of water with 1 ppm iron.Key Features:Product Dimensions: 3.6 x 5 x 9 inches ; 6.4 poundsShipping Weight: 27 pounds.