The plurality of diagonally formed apertures function to allow {TAIL ~ air flow} throughout {HEAD ~ the two piece housing} 
The plurality of diagonally formed apertures function to allow { TAIL ~ air flow } throughout { HEAD ~ the two piece housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD