This is inventory from my tool grinding shop, that I closed. 

Norton

SD320-J100B-1/8

• SD – synthetic diamond
• Grit 320
  
• Hardness J
  
• Concentration  100%
  
• 1/8--Grit depth (across radius)
• OD 5
  
• Bore size 1.25 in, with included adapter
  
• Grit width  1
  

 Wheel is double-boxed.  The inner box will be similar to the one shown in the photos.

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