These combination tail light and stop lights feature 16 high-quality, low-draw LEDs, so they reduce both the weight on your bike’s rear fender, and the load on the electrical system. So compact they fit any rearward surface, yet large enough to provide good lighting. Each version includes plug-type terminals for installation, and features a tough, high impact, all-weather case. Both Flex Lights (4.3"×.75"×.35") have adhesive backing and are bendable for mounting to curved surfaces like your rear fender. Flex Combo has two holes for a more secure installation with included nuts and bolts. The Solid Bolt-On (4.3"×.75"×.75") is virtually the same light as the others but features a thicker, solid, non-flexible backing with two fixed post bolts for mounting. Functionally, these can augment or replace your bike’s tail light. 12V.