Anyone know what this is?

[GymB]

feels like a coarse ceramic tumbling media. Base is about 1/4” square.

Got it with a pile of reloading stuff,

Any ideas?

 

[Catfish]

What kind of material? It looks like cheese

 

[Jerzsubbie]

Looks to be a fine resin media.
https://www.gamut.com/p/plastic-pyramid-tumbling-media-for-vibratory-tumbler-MTkyMTQ=

 

[GymB]

What kind of material? It looks like cheese

I was hoping for a little Parmigiano-Reggiano, but I was disappointed.

Looks to be a fine resin media.
https://www.gamut.com/p/plastic-pyramid-tumbling-media-for-vibratory-tumbler-MTkyMTQ=

That sure looks like it. Hmm, maybe I’ll try tumbling some swaged bullets to see if it makes them pretty? Too large for brass, I’m afraid that it would pack inside. Maybe for descaling 22lr brass after annealing? Any ideas?

 

[Bailey Boat]

It looks like a tumbling media for larger cast parts, not intended for re-loading purposes