One Pair 3157 RED 39 LED Light(2 Bulbs) /12v / Turn Signal Light, Corner Light, Stop Light, Parking Light, Side Marker Light, Tail Light, and Backup Lights 12 LEDs up layer, 27 LEDs down layers. Total 39 LEDs Lights with Wide View Angle for better reflection. Diameter 25mm (1.0"). 19mm height (LED part). 44mm total height. This is for one pair of 3157 LED bulbs (2 bulbs) (Dual Beams) Cross Reference: 3057, 3357