Fundamental Rockhound Products: 5 lb HDPE Plastic Pellets Beads Rock Tumbling Media for Filler, Cushioning, Protecting Five pounds white plastic pellets for rock tumbling. Used to cushion stones, protect delicate stones, or use as a filler. Made of recycled material, colors range from clear to white and occasionally grey. Size is approximately 1/8" and flat like a little pancake Well packaged in heavy duty plastic bag reclosable bag for easy open and close. Pellets are HDPE - High Density PolyEthelene, more durable and longer lasting than the more expensive Polypropelene pellets. They FLOAT! so are easy to clean. See description below for more information. Made in USA