Kerr Satin Cast 20 Jewelers Casting Investment 33lb This is a new box of Kerr Lab Satin Cast 20 Allows you to achieve first rate casting quality Through extensive research and development, this satin-smooth casting investment meets the technological demands of today's cutting-edge casting operations Top jewelry casters from around the world know this casting investment for its ability to meet the highest demands for excellence Satin cast produces a consistent finish on all your casting