This review is for:
K&F Concept 77MM UV Filter & CPL Polarising Filter HD Anti-Reflection 28 Layer Multi-Coated Slim MRC Optical Filter (Nano-X Series)

This is an impressive two-filter kit. Common to both filters, they:
- Offer excellent transparency
- No discernible anomalies in the glass
- Excellent image quality
- No coloration
- The low reflectivity coatings offer easy cleaning and scratch resistance
- The ring and threads are well formed
- Sufficiently thin form-factor, excellent for most applications including UWA
- Nice anodized finish
- Satisfactory knurling to aid installation and removal
- Hard cases
- Lens caps, lanyards and microfiber cloths add value

Additionally, the polarizing filter rotates well and polarizes effectively. Excellent.

Misses?
- There are no labels on the filter cases. I'll make my own labels as I don't like to carry boxes.
- The filter cases are a bit thick as they are designed to hold both a filter and a mounted lens cap.

Nothing major but worth noting.

The K&F products I have had over the years are generally well designed with excellent attention paid to detail. This two-filter kit is no exception. Worth considering. Recommended accordingly.