Crystal-clear spa water starts with the right filtration. This **Top Load Spa Filter Cartridge Box Kit of 2** delivers powerful cleaning performance for your spa or swim spa. Each cartridge features **Microban® antimicrobial technology** that actively inhibits bacteria, mould, and mildew growth on the filter surface, extending cartridge life and keeping your water fresher longer. With **high-density pleated polyester media** and a precision **55mm coarse threaded insert**, these filters fit securely and perform reliably across a wide range of Australian spa brands including Bullfrog, Cyclone, Signature, and Bunnings Oasis models. Measuring 145mm high by 200mm diameter, this twin-pack replaces the older RFILA20050 and RFILA20025 models. Perfect for routine maintenance or seasonal replacement, you'll enjoy uninterrupted filtration and peace of mind knowing your spa water stays clean and hygienic.