Glasfloss Industries PTA20251 PTA Series Heavy Duty Disposable Panel Air Filter， 12-Case<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Progressively Dense Media</li><li>Metal Retainer Grills</li><li>Made in the USA</li><li>Heavy-Duty Construction</li><li>Thermally Bonded</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51QUTiyJxvL.jpg" noproxy>