Yup, it's a case of 12 P100 North filters
They're filters.  They came solid, not like any were cracked, or used, or anything like that.  I got 12 new North P100's.  Still wish NIOSH didn't choose pink for the filters I use the most, but hey.  If you need P100's and have a North mask (which I highly recommend) buy this case, throw it in the shop and you'll never be out. Plus the per filter price is really good.  Shipping wasn't like 2-day or anything - took a little time for them to come in, so don't buy them the week of a job thinking you'll have them in time - buy them to stock up supplies.  Happy I bought.
Rating: 4 stars