Improve your rock tumbler performance and results through every polishing stage with National Geographic Ceramic Media! You will receive 1.5 pounds of ceramic tumbling media, enough to use through multiple rock tumbling cycles. Ceramic tumbler media is reusable and safe to include in every rock tumbling grit cycle. The benefits of using rock tumbling ceramic pellets are numerous. Ceramic pellets reduce tumbling noise, they help deliver rock tumbler grit more effectively to more rock surfaces while tumbling, they serve as filler for smaller tumbler batches, and they improve tumbling action when there are large rocks in the tumbling barrel. Plus they are reusable and can be used in place of smaller ceramic pellets when worn down after use. These ceramic tumbling pellets are compatible with any rock tumbler, but for the best results use them with National Geographic rock tumblers, tumbling grit, GemFoam polishing media, and be sure to check out our broad assortment of rock refill packs. National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.