https://www.filmtools.com/schneider-optics-ctb-filter-6-6x6-6-13094-68-039066.html
Schneider Optics 6.6 x 6.6" Color Temperature Blue 1/8 Filter 68-039066 - Filmtools
Buy your Schneider Optics 6.6 x 6.6" Color Temperature Blue 1/8 Filter 68-039066 at Filmtools