Aladdin 20201ECO Eco Replacement Filter Cartridge for Sta-Rite Posi-Flo 100 TX 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. Made in the USA This is a ECO replacement part Part Number 20201ECO This is an aftermarket of generic part