Profoto Frosted UV -300K Glass Plate for Flat Front flash is a clear glass cover for flat front lights and is used with B1, B1X, D1 and D2. It is available with different coatings: a standard frosted one, a UV -300K one, a UV -600K one for uniform diffused light, and a clear option for a harder, crisper light. All generate a warmer or cooler light. Please note that the Glass Plate for Flat Front is not compatible with the B2.
Profoto’s Glass Plate lowers (warms) the color temperature of the light emitted by 300K while slightly softening the output. It approximates the use of an 81A filter on a camera lens. Use it if the color temperature is too blue for your preference or assignment requirements. This glass plate is held by 3 clips that are part of the D1 and B1.