This is a A-B1OR534516 Sharpening Stone PN: B1OR534516Main Description As Following : A-B1OR534516 Sharpening Stone P.N: B1OR534516 B1SU136R, B1SU166Center Hole: 12mmDiameter: 145mmGrit: 3/4", Depth gaugeMaterial: VitrifiedReplaces: TL516Width: 10mm Crossed From: A2805 PACIFIC GRINDING WHEEL Found in Section & Models : Sunbelt - Blades > Blade Tools & Accessories, Belsaw GRINDER, BLADE: SEVERAL, Efco GRINDER, BLADE: SEVERAL, Oregon GRINDER, BLADE: SEVERAL, Total GRINDER, BLADE: SEVERAL, Windsor GRINDER, BLADE: SEVERAL, Sunbelt - Equipment > Grinders, Belsaw GRINDER, BLADE: SEVERAL, Efco GRINDER, BLADE: SEVERAL, Oregon GRINDER, BLADE: SEVERAL, Total GRINDER, BLADE: SEVERAL, Windsor GRINDER, BLADE: SEVERAL Associated Items : A-B1A2001100V Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada