The Speedglas Standard Outside Protection Plate is designed to protect the auto-darkening filter from spark and spatter.
Failure to use an outside protection plate with the filter voids the warranty if spark or spatter contaminate the glass.

Easily replaceable, this sacrificial lens should always be used to protect the expensive auto-darkening filter.

Outside Protection Plates are available in the following models: Standard, Scratch Resistant, and High Temperature.