Polypropylene Plastic Poly Pellets Rock Tumbling Media. 2 lbs. Polly Plastics Rock Tumbler Filler Beads in Heavy Duty Resealable Bag. TWO LBS. Clear poly pellets. Perfect for protecting stones or filling while rock tumbling. Cushions, quiets and improves tumbling action. Packaged in durable, re-closable seal bags to prevent messy spills and to safely store unused pellets for later. PREMIUM virgin polypropylene made in the USA. Non-toxic, non-static and non-residue pellets are dryable and easy to reuse  float to the top for easy cleaning.