Tom I'm very interested. I don't understand what you mean by 25ppi though. I need a coarse foam. Is this fine like a upholstery foam or more like the blue eheim filter pads?
Think you can squeeze one of those blocks into a small USPS flat-rate box?
The foam is pore per inch(ppi) and is coarse foam.
I might be able to pack it into a large USPS box, no way for anything smaller.
I think regular parcel post would be best for ship cost. 3rd class etc.
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