Thank you for using the NBK website.

For the part numbers below, the material will be changed from Nylon 66 to Nylon 6.
Nylon 66 is becoming difficult to obtain worldwide, due to the sudden increase in demand for nylon resin as well as the resin factory stoppage in Texas (USA) due to a deep freeze. In order to fulfill our supply responsibilities, we have decided to change the material used in the part numbers below, which have so far used Nylon 66.
This change will not affect the function of the products as knobs, nor will there be any difference in appearance. Likewise, the part numbers, dimensions, and prices will remain the same.

See here for details

We apologize for the inconvenience and hope you will visit the site again.