To increase its strength and durability. Excellent workmanship, delicate surface, fashionable and distinctive style. Great decoration, upgrade the car interior with this finish. The radian design car, fits perfectly to. Double-sided adhesive tape on the back, easy to install. Condition:For 1 Series F20 2012-2017For 3 Series F30 2013-2019For 3 Series F34 2013-2019For 4 Series F33 F36 2016-2019(For Driving On The Left Side)Note:Please kindly confirm the order so that this item fits perfectlyThe adhesive tape is on the back. Use a hair dryer with adhesive tape installed to make the item stick firmly. Color: Carbon Fiber Pattern Material: ABS Package Content: 1 Set x Car Window Frame Lift Button Only the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.