Features: Ensure reliable and stable operation with the universal control circuit board for water heaters, providing effective circuit control. Quality plastic material for preventing ignition failures and improving user experience. Suitable for repair technicians, DIY enthusiasts with heater knowledge, and users facing ignition issues. Perfect for series water heaters, simplifying maintenance and reducing repair costs. For a range of water heaters, ensuring ease of replace for users experiencing ignition problems. Specifications: Material: Plastic Part Number: 520871 520814 520820 AP4896608 33550L Applicable Model: for SW4D SW6D SW6DE SW6DEL SW6DEM SW6DM SW10D SW10DE SW10DEL SW10DEM SW10DM SW12D SW12DE SW12DEL SW12DEM SW16D SW16DE SW16DEL SW16DEM Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Ignition Control Circuit Module Board