5½-inch diameter 1A type (light red) filter for Kodak Model A and Model B safelights.
OC type safelight filter for safelight housings that accept 5"x 7" filters.
Light red 1A type safelight filter for Koday 2-Way Safelamps and other safelights that accept 3¼"x 4¾" filters.
1A type light red safelight filter for safelights that accept 8"x 10" size filters.