Up for sale are 10 Therma-Tech Filter Elements. They are new old stock. No manufacturer box. The total length is 32.5". The width is 10". The filter is 3/8" thick. These do have a national stock number (NSN: 4130-01-532-6742). These filters have never been used and are still wrapped in plastic. See pictures for details. If you have any questions feel free to email.