Feature: 1. 4 Pcs in Set: This set contains 4 pcs filters for your use, with strong adsorption, which is best to replace the filter every two weeks 2. Keep Cleaning: This filter helps the pool remove buildup and debris by collecting trash, keeping the water clean 3. Powerful Filtration: This spa filter effectively removes hair, leaves, dust, sediment, sand and more, provide you with a safe leisure time 4. Easy to Clean: This pool filter is made of heavy duty polyester fabric, easy to clean, you can scrub with cartridge cleaning tool, then wash under strong water pressure to remove loose particles 5. Wide Application: This replacement filter cartridge can be applied to pump pools, swimming pools, spa pools, etc. Specification: Item Type: Swimming Pool Filter Material: Polyurethane, non woven fabric Size: Outer Diameter: Approx.107mm/4.2in Inner Diameter: Approx.52mm/2in Height: Approx.95mm/3.7in Suitable for: Pump pool, swimming pool, spa pool. Package List: 4 x Swimming Pool Filter