We call this the Arrow Signal. It is a very popular product. We sell more of these in chrome than in any other finish. The chrome version is very heavy plated and that is a real electrolytic chrome finish.
There are several painted versions. Those with matching color are painted with Color Rite acyclic urethane paints. All the painted versions are clear coated with Akzo Nobel AutoBase II clear coat.
The lenses are hard acrylic plastic. This type of plastic is very resistance to UV light and should not yellow in sunlight. Each lens is secured with a minature stainless steel screw.
Each signal is mounted on a real rubberized grommet and allows the signal to flex a bit if bumped.
Each signal also comes with a 8 Watt high-intensity bulb and wiring terminated with standard bullet type end connectors. In some cases, you will need to splice new ends on to these signals to adapt to your bike's wiring harness.