This 3" x 3" filter eliminates over 99% of all UV wavelengths below 400nm, but allows Visible and IR light (up to 2000nm) through. Unfortunately, its transmission efficiency in the Visible range is only 85%. This filter can be purchased with the correct mounting frame for use in Sciencetech Model SF150, SS150 and SS (500,1K,1.6K) solar simulators as well as inside the 3" FH filter holder.