This is the very best polarizer used by professional photographers, the latest Mark II model.
I bought it last year in Japan but sold my lens that fits the 55mm size.
A new one would cost you $100. And this one is just as good.
Thanks for your interest.
Below is some specifics from Marumi's site:
Marumi EXUS Circular PL
The Marumi EXUS Circular Polarizer is a flagship model polarizer especially well-suited to whom a high-polarization has taken precedence in the first place in polarizing (99.5%* degree of linear polarization under 400nm; *polarizing film only)
Contrast-enhanced, more saturation provided, and blue sky will be vividly deepened.
The High Transmission Circular Polarizer (HTC) performs approximately 93.6% maximum transmission rate and an averagely of 44%. (2.3 x Filter Factor, 1.2 stops, 400-700nm)
The upmost coating technology implemented, eighteen layers in total on both sides;
Anti-static coating (ASC) works wonders on the surface of a glass. Dust and dirt adhered to the surface can be quickly and easily blown off.
Water-/Oil repellent coating shed water off simply also by the air blower. Nuisances such as sweats, skin crème, lotion, fingerprint, or compounded grease stains will be wiped off.
ASC Coating and light-blocking ridges inside the ring reduce reflection rate under 0.6%. (420-680nm average)
Realized an ultra-thin aluminum rotating structure to avoid vignetting.
Teflon coating on male threads makes attach-/detachment to/from the lens more smooth.
Knurling embedded on the lightweight frame enables easy and smooth handling
Made in Japan, indurated lamination technology by decades of technical succession.