HEPA 700 2 INCH PRE FILTER P/N125026 HEPA FILTER

I AM NOT TOTALLY UP ON WHAT THIS IS FOR. OUR GRANDSON'S ROOM GOT FULL OF FIBERGLASS WHEN HIS MATTRESS FAILED. YES FIBERGLASS. IT IS IN A LOT OF MATTRESSES AS A FLAME RETARDANT, BUT CAN BREAK DOWN AND FILL THE AIR IN A ROOM WITH DANGEROUS TINY SHARDS. PART OF THE CLEANING HE DID WAS RENTING A FAN THAT FILTERED OUT ALL THAT, AND THIS FILTER IS FOR ONE OF THOSE AIR SCRUBBERS. THIS ONE WAS NOT USED AND WE HAVE NO FURTHER USE FOR IT