a plurality of bristles secured to the inner surface of the inner wall, {HEAD ~ the plurality} of bristles tapering towards {TAIL ~ a center portion} of the inner wall, the plurality of bristles serving to remove dust particles from the ceiling fan; and 
tapering towards
a plurality of bristles secured to the inner surface of the inner wall , { HEAD ~ the plurality } of bristles tapering towards { TAIL ~ a center portion } of the inner wall , the plurality of bristles serving to remove dust particles from the ceiling fan ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH