AGW-250/3: A variant of the True Didymium, features a shade 3 filter laminated to the lens to "dim down" the bright light that occurs when working with silvered soft glass if you have light-sensitive eyes. A 'True Didymium' filter.
AGW-300: A variant of the True Didymium, features a clear IR (infra-red) filter that will help people who have sensitive or dry eyes. A 'True Didymium' filter.
When your filter selection is complete, be sure to select a frame from the link below.