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What do the letters A-60-SBF mean?

A= Aluminum Oxide
C= Silicon Carbide
Z= Zirconia Alumina

The Middle Number is Grit Size
16- 100

The next letter is Hardness grade:
N,O,P Soft
Q.R.S Medium
T,U,V Hard

The last two letters are the Bond:
B= Resin
BF = Resin with Fiberglass reinforcement

By: Craig Cooley

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