6 x 25 mm was so close to one of the Russian industrial standard sizes for diamonds - 100 x 25 mm

F100 + F240

while Edge Pro offers a limited assortment

Product size: 150 x 25 x 10 mm (6" x 1" x 3/8")

ruby ceramic stone for kmex 6 x 25 mm wasRuby Ceramic Sharpening Stones are used for sharpening knives on KME and Hapstone knife sharpeners. Ruby stones are made of Alumina ceramic with a high hardness rating and estimated grit approximately 3000 JIS. Ruby Ceramic scarcely wears over time. Extra fine ceramic stones provide a super finish for the cutting edge. Ruby Ceramic is preliminarily lapped and does not require lapping after purchase. Ruby Ceramic stones should be used with oil as a