Aladdin 19002ECO Replacement Filter Cartridge for Hayward Star Clear Plus C-900 Polyester industrial filter material made from 90 percent post-consumer recycled (PCR) Plastic Each square foot of filter material removes one 16oz plastic bottle from the landfills ECO Line filters are better for the planet by repurposing plastic bottles, improving energy efficiency and decreasing waste Strong PVC 160 PSI core Made in the USA