Composition: Co Al Zn References: Can be used as a body stain. Maximum temperature 2300 F. May be used with our without Zinc. Mason Stains Home Page 6339 Royal Blue - 1/4 pound 6339-14$5.97 Royal Blue - 1/2 pound 6339-12$11.17 Royal Blue - 1 pound 6339-1$20.79 Royal Blue - 5 pounds 6339-5$96.25