Whink® Rust Stain Remover. Eliminates rust stains! Quickly & easily removes rust stains! White sinks and white toilet bowls. Colorfast fabrics. Safe on pipes and septic systems. Not a general purpose rust remover. 32 fl oz (1 qt) 946 ml. Same great product! Comments, Questions: Call Toll-free 1-800-247-5102, weekdays 9-4 CST. Visit www.whink.com. © 2017 Whink Products Company.