Glass airsoft BB packing.

[Zeotropic]

I did a search but nothing came up that seems to be taking about this.
Glass airsoft BB packing.
They are 6mm diameter and appear to be made of normal glass but I don't know how to make absolutely sure they are lead free. They should be since lead glass is usually reserved for decorative uses. I have read that smaller packing is often better in smaller columns so i thought this might have some use. 6mm is 0.236 inch so just under a quarter inch. It may be a bit small for a 2 inch column but I figured that would have to be determined by testing to know for sure.
I have been trying to find an affordable packing for my future column build that didn't involve smashing rocks and I think this may be it unless you-all can see something I don't.

https://www.replicaairguns.us/bls-perfe ... ft-bb-028g

What do you all think?