Mica waveguide cover to fit some Daewoo microwave ovens
Daewoo part number was 3511408300
Overall dimensions including tabs approx 136 mm x 91 mm
If your microwave is arcing or sparking during cooking, it may be that the waveguide cover is damaged. This metallic type material, which is a blend of mica and is invisible to microwaves, it covers the aperture that the microwaves pass through to get into the oven cavity. When old damp or contaminated can react to microwaves by arcing.