Tiffen Professional Series 9 Blue B-1 1/2 B-3 B-6 B-12 Drop In Filter Set V12

This set of vintage Tiffen Professional Series 9 drop-in decamired blue cooling filters are 82.6mm or 3.25" each in diameter. Included in the set are B-1 1/2, B-3, B-6, and B-12 filters. They come in a filter case and appear to be unused.