The mobile, with its 19 black aluminum fins hanging off three main branches, is in constant flux.

The pillars are covered with large brown stone and the ceiling has two lighting bands veneered with aluminum fins.

Fiberglass fins are cheaper than aluminum fins, but in time they chip apart.

They don't weigh as much as aluminum fins either.

Small single aluminum fins first evolved into single larger wooden, then fiberglass and carbon versions.

The glass facade will have a vertical grid of inclined steel ribbons seven feet apart and horizontal aluminum fins.

Above these were protruding aluminum fins similar to those found on engines and other mechanical equipment.

Many units have a grid of soft aluminum fins designed to dissipate heat quickly.

They consist of copper pipes which have aluminum fins to increase their surface area.

Another improvement was the use of aluminum fins as a heat radiator.