Rhinoceros Beetle Sawdust Mat [Opened]

This is a mat to lay on the bottom of a beetle rearing case. I bought it 5 months ago, but I have some left over because my beetles are gone.

I bought this from a vendor selling beetles at a children's event.
I don't know the manufacturer or the type of wood.
It's for adult beetles, not larvae.
At the event, they mentioned that it's less likely to attract fruit flies compared to soil.
I purchased it for 1,500 yen.
I'm sorry, but I cannot offer discounts as shipping costs will apply m(_ _)m