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Posted by M Fanoni [65.98.184.194] on Tuesday, May 03, 2011 at 12:21:49 :
In Reply to: Re: take a look at what the factory uses posted by gmharris [71.105.178.157] on Monday, May 02, 2011 at 21:29:00 :
there is a Class 12.9, but not Grade 12 that I am aware of; a subtle but important distinction.