General description Replacement filter cartridges for Bubble Spa, compatible with all models. This set includes 4 high-quality cartridges designed to keep your pool water clean and fresh, ensuring a sparkling clean spa experience. Technical specifications Diameter: 11.5 cm Height: 8.6 cm Usage Helps remove dirt and ensures clean, fresh water. Installed in the filter pump to catch dust as water passes through the system. Prevents dust from entering the pump and heater, extending their lifespan. For maximum efficiency, clean the cartridge weekly and replace it once a month or sooner. Easy to clean and replace when needed.