Click here for details, specs & description on manufacturers site.
Kenko - PRO1D+ Instant Action Conversion Ring
Kenko - PRO1D+ Instant Action Adapter Ring
Kenko - STARRY NIGHT
Kenko - PRO1D+ Instant Action VARI NDX3-450+C-PL SET (Includes Filter and Adapter)
Kenko - PRO1D+ Instant Action C-PL SET (Includes Filter and Adapter)