If your microwave's inside looks burnt or the mica plate is damaged, this 5-pack of replacement sheets is exactly what you need. These mica plates sit inside the microwave (usually on the wall or ceiling) and protect the magnetron from food splatter and moisture. Without them, your microwave could get damaged and less efficient. Each sheet is about 4.6x2.5 inches (116x64mm), made from genuine mica material that's heat-resistant and insulating. They're easy to install: just remove the old, burnt plate and pop this one in (make sure the microwave is unplugged!). They also work in other appliances like hair dryers, toasters, and heaters. The pack of five means you have spares for future repairs. A must-have for DIY microwave maintenance—saves you a service call and keeps your microwave running safely.