[Filter Compatible Models] Our swimming pool filter type S1 is compatible with all Intex PureSpa models including 28403E, 28407E, 28443E, 28453E, 28421E, 28423E and 28413E. [Powerful Filtration Performance] Premium quality dacron fabric collects hair, leaves, dust, sediment, sand, and other impurities; easy to clean and replace. The S1 Intex hot tub filter cartridge is installed inside the filter pump and captures dirt as water passes through the system. [Easy To Clean] Our type S1 replacement spa filters feature extra-durable plastic and quality Dacron pleated fabric. These spa filters for hot tubs are easy to clean, allowing for repeated use. Enjoy clean leisure time in your pool. [Warm Tip] It is recommended to change the spa filter regularly to maintain filtration efficiency. Replace every 2-3 weeks to keep the water clean. Designed with a larger filter area for higher efficiency, durability, resistance to dilute acid, fine filtration, and strong dirt absorption ability. [Powerful Filtration Performance] The filter effectively removes hair, leaves, dust, sediment, sand, and other impurities, providing clear and clean water for a more enjoyable experience. Color: Blue Material: PET + Non-woven Fabric Size: 107 x 74mm Package Contents: 6 x Inflatable Pool Filter Cartridges Note: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.