ford cigarette lighter replacement Socket and Retainer For 1975-1992 F-150 Pickup Truck : Automotive accessory ONLY 1999-2014 Mustang Cigarette Lighter Receptacle

You can combine them with mix rgb node or a mix shader node, for this task I'll reccomend you to use mix shader node just plug both the colors/textures in a principal or shader you think is more preferable and combine them, now for the next part you can use a gradient texture with mapping node and object coordinates and plug it into the factor input( you may need to inverse it for that just invert the order of sockets you have plugged into mix shader, the lower one in upper and upper one in lower), now you can use a color ramp to tighten the gradient as per your liking and use mapping node to move or rotate it, you can even add a noise texture in middle of mapping node and object coordinate to make a random coming ash on paper.

Overall, handheld cigarette smoke detectors are an effective tool in detecting cigarette smoke and ensuring that smoking regulations are being followed

Whedon later denied the claims

As air is sucked into your cars cabin, cabin air filters trap airborne contaminants and debris before it enters your personal space