Compatible with multiple spa brands: this replacement filter is designed for spas across a range of models. With a diameter of 19 cm, this pack includes 4 filters for convenient replacement. Performance and benefits: - Effectively removes soap, oil and other suspended particles to keep spa water clean. - By reducing the need for frequent filter cleaning, it simplifies maintenance and supports healthier water. Easy installation: - Simply place the filter on the skimmer basket and align the notches for correct placement. - Rinse the filter weekly; adjust the rinsing frequency based on usage to maintain optimal performance. Replacement and durability: - Made from fiber with a sturdy PP frame for long life. - Replace every 3 months to ensure even performance and clear water. Practical use scenarios: - Ideal for residential hot tubs and home spas. - Suitable for small to mid-size commercial spa facilities with regular use. - Works well for outdoor spas that experience higher use and exposure to outdoor debris.