Guardian Filtration Product's goal is to provide the highest quality filters at the best prices. They are an American company headquartered in Greenville, PA and have been there since 2003. They manufacture direct replacements for popular brands and sizes in the pool and spa filtration business. Their filters are designed and manufactured to meet or exceed OEM specifications for superior filtration. Their filters capture dirt efficiently, are easy to clean and offer powerful performance. Expansive Flow Cores offer full water access to the filtration fabric. They are designed to be strong and reduce stress on your pump. Excellent cleanability allows the filters release maximum dirt when being cleaned to allow for reduced maintenance. That means less time spent getting your pool or spa filter back into service. The Guardian Filtration Advantage lets you know that you purchased a solid product that is built to perform!