Naniwa Dup 09 Ccd E 18 Hot 〈FHD〉

The stone has two distinct working surfaces, but not in the traditional "coarse on one side, fine on the other" sense.

You will not find this stone at a big-box retailer. The DUP 09 CCD E 18 Hot is usually salvaged from Japanese industrial liquidations, tool-and-die shops shutting down, or NOS (New Old Stock) eBay listings. Its popularity stems from three specific performance metrics: naniwa dup 09 ccd e 18 hot

The short answer:

For this specific configuration (CCD E 18 HOT), follow these general industrial pump guidelines: The stone has two distinct working surfaces, but