28 OZ, CLR Calcium, Lime & Rust Remover, Safer Choice Meets U.S. EPA Safer Product Standards, Industrial Strength, Cleans Away Calcium & Lime Deposits & Scales From Porcelain, Chrome, Glassware & Grout As Well As Additional Discoloration From Rust Stains, The Surface-To-Surface Power To Remove Calcium, Lime & Rust Instantly.