The device contains {HEAD ~ a plurality} of {TAIL ~ bristles} secured to the inner surface of the inner wall 
of
The device contains { HEAD ~ a plurality } of { TAIL ~ bristles } secured to the inner surface of the inner wall
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH