These black interior knobs provide a functional upgrade for your vehicle’s window and vent controls while adding a touch of elegance to the interior hardware. - Functional upgrade and refined design: an elegant black finish that enhances the look of your interior hardware while improving control and usability. - Practical for routine maintenance or emergency repairs: a reliable solution to keep your vehicle’s ventilation and window mechanisms operating smoothly, whether at home or on the road. - Sized for broad compatibility: outer diameter 2 1/4 in (2.25 in) and length 1 in to fit a wide range of window and ventilation systems. - Durable ABS plastic construction: designed for long lasting performance and stability, improving the reliability of your window and vent knobs. Use scenarios - Routine maintenance: replace worn or loose knobs during regular service to restore smooth operation and feel. - Roadside and emergency repair: quickly address a malfunctioning knob while traveling to restore function without extensive downtime. - Fleet or multi-vehicle use: stock spare knobs for vehicles with compatible window and vent controls to simplify upkeep across the fleet.