The thermal gain expected
from 10 to 12 fins is so small in this case that having two
additional fins would not likely justify the additional cost
.~curred by extra material and, more importantly, the different
manufacturing method that must be employed to
produce the heat sink with more than 11 fins. The fin
height-t-gap aspect ratio of this heat sink with more than
11 fins exceeds the maximum ratio of 6 attainable with a
cost effective, standard extrusion method.