Compatible Models:Headlight switch fit for Peterbilt 330, 357, 359, 377, 378, 379 2004 - 2005, 387.Will not fit for Peterbilt 379 models with their newer dashboard style(2005+).(Please kindly check your machine model before ordering).Quality Material:Made of high-quality materials, it boasts exceptional durability to withstand the challenges of truck transportationPerfect match:This light toggle switch controls headlamp and clearance lights, 2-position double pole single throw with 4 blades Designed specifically for trucks.Easy Installation :Direct Replacement headlight dimmer switch , with no need for complex tools or professional skills reducing maintenance time and hassleHigh quality service:If you have any dissatisfaction with the product upon receipt,please contact us in a timely manner.Maigoo will provide you with the most satisfactory response