Feature:1. Strong Compatibility: 9991433 R4 spring filter cartridges are suitable for M500, M200, M400 series robotic pool cleaner, ensuring compatibility and availability.2. Efficient Filtration: Ultrafine spring filter cartridges effectively remove impurities and pollutants from water, ensuring clear and transparent water quality.3. Ultrafine Filter: Adopting ultra fine filter, spring filter cartridges for M500 can capture small particles and provide cleaner water quality.4. Long Lifespan: After careful design, the spring filter cartridges for M200 has a longer lifespan, reducing replacement frequency and maintenance costs.5. Easy to Use: 9991433 R4 spring filter cartridges are easy to install and replace, allowing you to easily enjoy fresh water quality.Specification:Item Type: Robotic Pool Cleaner Spring Filter CartridgesProduct Material: ABSWeight: Approx. 232g / 8.2oz.Package List:4 x Robotic Pool Cleaner Spring Filter Cartridges