Hot Tub Compatible With Sundance Spas Filter Cartridge 130 Sq Ft HTCPSD6473-165/6473-165Replacement Jacuzzi Sundance filter for certain Sundance spa models. Micro Clean Ultra Fits all 2009+ 880 Spas. Engineered as the Industries 1st Interlocking System to Provide Dual Filtration Resulting in the Purest Water. The Outer Core Traps Large Particles While the Inner Core Traps Ultra Fine Particles. This is for 1 piece Sundance Outer Core Filter Cartridge This is an after market part High grade material that's made to last!! Replaces