Unicel 4CH-21 19 Sq.Ft. Saratoga Filter, 4-5/8x8"L, Handle,1.5"MPT chlorine-and-bromine This easy-to-use oxidizer delivers four

This easy-to-use oxidizer delivers four key benefits in one formula: it shocks

Cabinet Material: Polyester-coated galvanized steel (weather-resistant)

Genuine Polaris replacement part C66

• Plug-and-play replacement — no reprogramming needed

⚙️ High Efficiency: Optimized for powerful water flow and reduced energy consumption

Unicel 4CH-21 19 Sq.Ft. Saratoga Filter, 4-5/8x8"L, Handle,1.5"MPT chlorine-and-bromine This easy-to-use oxidizer delivers fourUnicel 4CH 21 Spa Filter Cartridge Part # 4CH 21 19 sq. ft. Saratoga replacement filter 4 5 8 in. diameter x 8 in. length Handle and 1. 5 in. male pipe thread The Unicel 4CH 21 is a high quality replacement spa filter cartridge designed for Saratoga spas and other compatible hot tub systems that use this cartridge style. Built for reliable filtration, it helps capture dirt, debris, and fine particles to keep spa water cleaner and clearer while