If being used as a turn signal, a load equalizer is required.. Each features nine intensely bright LEDs in a cluster module for light output, amazing for its size (roughly 3/4 diameter at the light source). Amber only for fork mount version. All parts are fully CNC machined from 6061-T6 billet aluminum. Available in your choice of chrome, clear anodized or hard black anodized finishes. May be rotated into virtually any upward-and-downward setting. Dimensions: a little over 1in. diameter, 23/8in. long, and stand off the bike 11/2in. Center-Mount Turn Signal Marker Lights can be mounted in almost any 5/16in. or 8mm hole; wires feed through a pre-drilled hole in the mounting bolt. Made in the USA.