The mineral casting is preferably made of resin, {TAIL ~ hardener} and {HEAD ~ mineral fillers} 
The mineral casting is preferably made of resin , { TAIL ~ hardener } and { HEAD ~ mineral fillers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD