Homeowners and repair technicians, this Dinosaur Electronics cover is exactly what you need to protect your appliance igniter boards! The large size measures 3.5x5.1 inches, making it perfect for bigger ignitor boards in water heaters and refrigerators. The clear ABS material is fire retardant and tough enough to handle the heat and moisture inside appliances, while still letting you see the diagnostic LED lights to troubleshoot issues. Installation is straightforward - it works with both spade and post-type boards, and the transparent design means you don't have to remove the cover to check if everything's working properly. This isn't for furnaces though - stick to water heaters and fridges only. The quality is typical Dinosaur Electronics - reliable, well-made, and affordable. If you're tired of replacing entire boards because of moisture damage or dust accumulation, this simple cover can save you money and extend the life of your components. It's one of those simple solutions that actually makes a big difference in appliance longevity. Whether you're a DIY enthusiast or professional repair person, having a few of these on hand is just smart maintenance for keeping appliances running smoothly.