Infinish BC4856 Super Finish White Polishing Compound is the same formula as the Matchless 8B56. This super finishing metal polish has a medium grease content. BC4857 is a high color finishing finishing compound. Very clean working, leaves minimal surface residue. Excellent choice for aluminum. Generally used for final finishing work. Recommended for use with Domet flannel and untreated cloth buffs. Can produce a clear mirror finish. Bars are approximately 2" x 2" x 8" and have an average weight of 2.5 pounds.