Pool spa filter cartridge has the function of efficiently locking and wiping leaves, dust, sand, sediment, hair, etc, which provides a clean environment for you and your family to relax in the spa and hot tub. PET polyester shaped silk non-woven fabric thickened trilobal fabric can filter 99% of contaminants, good filtration, strong end caps,High-pressure-bearing end caps with durable materials resist chlorine degradation and provide support for the filter material, will work more efficiently and last longer.The spa filter with thickened trilobal fabric, heavy chlorine and break resistant end caps and reinforced center supportcan block hair, leaves, dust, accumulation, sand, rust, algae, colloids and other large particle impurities, clean and high quality water to enjoy a good leisure spa time. Regular cleaning Pool Filter Cartridge to ensure better water quality and a better working pump.No flakes, no deformation,can bear high pressure.the filter also needs to be replaced regularly to make your pool filter work more efficiently. Six-Months Return Policy Guaranteed if the products are with any quality shortages! We attach great importance to all customers perfect experience of our products.And we are equipped with professional service to provide technical support for every customer.