65 ft² filter area. Printed 0989601 on top of filter. Ceramic fiber filter for Hot Spring Spas. This filter can replace the 71825 filter in all 1990-current Hot Spring spa models, 1998-2002 Hot Spot models and all Solana X, RX, SX & TX spa models. This filter can be rinsed in your dish washer set to a rinse cycle!