16 OZ, Super Iron Out Liquid Rust Remover, Perfect For Vertical Surfaces & Hard To Reach Areas, Fast Effective Remover Of The Toughest Rust & Iron Stains, The Convenient Spray Formula Safely Cleans Most Interior/Exterior Surfaces & Colorfast Fabrics, The New Patented Formula Is As Effective, Yet Much Safer Than Traditional Liquid Rust Removers Due to its Non-Hydrofluoric Acid Design.