Quarter glass and vent glass are two types of automotive windows that serve different functions in a vehicle. Here is a brief overview of the differences between quarter and vent glass:

Quarter Glass:
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Quarter glass is a small triangular window that is located behind the front doors of a car or truck. It is named "quarter glass" because it takes up about a quarter of the area of the side of the vehicle. Quarter glass is typically stationary and does not move, but it can sometimes be designed to be opened or vented. Its primary purpose is to provide additional visibility for the driver and passengers, and to allow more natural light into the vehicle.

Vent Glass:
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Vent glass, on the other hand, is a smaller window that is usually located at the front of the door window. It is named "vent glass" because it can be opened or tilted outward to allow fresh air to flow into the vehicle. It is typically designed to be adjustable, allowing the driver or passenger to control the amount of airflow into the vehicle. Vent glass can also provide additional visibility, especially when turning or changing lanes.

In summary, quarter glass is a fixed window located behind the front doors of a vehicle, primarily for increased visibility and natural light, while vent glass is a smaller window that can be opened or tilted to allow airflow into the vehicle.

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