dragon
Was waiting to go to work and saw your post.
Didn't have the slightest idea what you were referring to so I did a google search and found that the difference is (TP347H is coarse grain ) and (TP347HFG (FG) Fine Grain)
http://books.google.com/books?id=vIwAuzWcKRAC&pg=PA444&lpg=PA444&dq=What's+the+difference+of+TP347HFG+and+TP347H%3F&source=bl&ots=HGPLAqSiKx&sig=ebW1Sbn6SeA_QAwFP39jDivnAfw&hl=en&ei=HBZuTf_DB9K9tgfKvsmGDw&sa=X&oi=book_result&ct=result&resnum=7&ved=0CDsQ6AEwBg#v=onepage&q&f=false
Good Luck
Marshall