Optimize your spa’s performance with the Magnum 125 sq ft filter. Its large filtration surface and high-efficiency trilobe media capture more impurities, keeping your water crystal clear for longer. With standard dimensions and connections—1 1/2'' male slip on top and 2 1/2'' open on the bottom—it is a perfect replacement for Sundance filters and many other well-known equivalents. A durable and high-performing choice to maintain a clean, clear, stable, and enjoyable spa experience.