Tumble Soap, Size 1 lb, Density 1 lb cu/ft, Weight 1 lb, For Use With Vibratory Tumbler, Brightens Copper, Brass, Steel, Tin, Zinc, Aluminum for a Fine Finish on Precious Metals, Used to Burnish Improve Luster, Water must be at least 110 Degrees for soap to Melt, Foam and Clean