LED bulb size: 51mm (length) * 16mm (base diameter), with high brightness 5630 33SMD LED, brighter than ordinary incandescent bulbs. Long life and lasts around 50,000 hours. is suitable for: 1156 BA15S P21W 1141 1095 7506 1156 1156A 1156NA 1073 1093 1129 1141 1159 12088 1259 1295NA 1459 1619 1651 1680 3496 5007 5008 7527 1996 3497 97A 97NA. Applies to interior and exterior auto parts of most cars, SUVs, vans, motorcycles, scooters, trailers, trucks such as brake lights, rear fog lights, running lights, interior motorhome caravan taillights, marker lights, side marker lights and bulbs. The outer casing is made of aluminum which is good for heat dissipation. Lights up without delay, effectively preventing rear events. Easy to install, no need to change the route of the original car, plug and play.