This 4-inch round light is a versatile addition to any vehicle, with 20 LED diodes that provide a combination of red and white stop, turn, tail, and back-up lighting. The polycarbonate housing and lens ensure durability, while the dual PL-3 connection and grommet mount make installation easy. Available in both 12 and 12-24 volt options, this light fits most makes and models and meets FMVSS S2 T2 I6 (2)R standards. At 4.31 inches wide by 4.31 inches tall by 1.62 inches deep, it's a practical and reliable choice for any driver.