Tonmp 5 Pounds 5/16 X 5/8 Inch Rock Tumbling Ceramic Filler Media - Large Cylinder Ceramic Pellets for All Type Tumblers

This did the trick. My rocks dwindled in size so too maker up room in the tumbler, these worked perfectly. The batch I used seems good enough for another run, too.

Worked great in my tumbler!

Exactly as advertised. They work fantasticslly

I liked these bigger pellets for tumbling with bigger stones. Really kept the grit moving. Definitely buying again.

Received them quick and they worked great with my rock tumbling