Sanyo microwave oven mica waveguide cover.
Part number: GA-EM-G4775/P12S - Supplied in packs of two.
These mica waveguide covers for Sanyo microwave ovens are rectangular in shape.
Length 141 mm
Height 106 mm
Thickness 0.3 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.