Code 31:
For aperture 24" x 8"

Code 33:
 For aperture 10"x10", 10"x7"

Code 38:
For aperture 8"x6", 7"x5", 6"x4"

Code 39
For aperture 8"x6"

Code 40
For aperture 8"x6"

Code 41
For aperture 8"x6"

Code 42
For aperture 8"x6"