The frame includes {HEAD ~ a selected number} of horizontal muntins and {TAIL ~ vertical mullions} defining a plurality of clear window openings 
of
The frame includes { HEAD ~ a selected number } of horizontal muntins and { TAIL ~ vertical mullions } defining a plurality of clear window openings
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH