Measuring 0.94x1.8x0.78inches, these tankless water heater engineered specifically for tankless water heaters—verify compatibility before purchase to ensures proper fit and function The tankless water heater filter replacement set provides advanced dirt retention, ensuring optimal water flowing and efficiency when replaced every 2-3 months Regular replacement helps maintain water heater function by sediment buildup and prolonging appliance durability Designed for easy replacement, this filter can be installed or removed within 5 minutes without tool, minimizing downtime For any inquiries regarding the filter set, our dedicated team provides prompt assistance within 24hours for pre-saling questions or post purchase guide