Atlas Homewares Oskar KnobAtlas Homewares Oskar Knob is a round knob with rimmed edges and stacked round post. Available in six finishes to complement any decor. 1-1/4-inches. Zinc Alloy.Limited Lifetime WarrantyProducts should be cleaned only with a soft cloth dampened with clear water and wiped dry with a cloth. Water or soap residue should not be left on the product as the chemicals or minerals contained within will eventually violate the protective coating and attack the finish. Do not use harsh cleaners or waxes to clean the product as they will also attack the protective finish.