Our sharpening stone were made by brown / white aluminum oxide, green / black silicon carbide.

They also can be supplied in required size and type.

Combination Sharpening Stone

6" x 2" x 1"  (150 x 50 x 25mm) A/A    Fine/Coarse

8" x 2" x 1"  (200 x 50 x 25mm) A/A   Fine/Coarse
 

6" x 2" x 1"  (150 x 50 x 25mm) WA/A   Fine/Coarse

8" x 2" x 1"  (200 x 50 x 25mm) WA/A   Fine/Coarse 
 

6" x 2" x 1"  (150 x 50 x 25mm) C/C  Fine/Coarse

8" x 2" x 1"  (200 x 50 x 25mm) C/C  Fine/Coarse

6" x 2" x 1"  (150 x 50 x 25mm) C/GC   Fine/Coarse

8" x 2" x 1"  (200 x 50 x 25mm) C/GC   Fine/Coarse

They also can be in supplied by required size,type,grit size.