Whink® Rust Stain Remover. Eliminates rust stains! Quickly & easily removes rust stains! White sinks and white toilet bowls. Colorfast fabrics and carpet. Safe on pipes and septic systems. 6 fl oz (177 ml). Comments, questions: Call weekdays 9-4 CST Toll free 1-800-247-5102. Visit www.whink.com. © 2013 Whink Products Company.