Ampper Upgrade 2" Blind Spot Mirrors, 360 Degree Rotate Sway Adjustabe HD Glass Convex Wide Angle Rear View Car SUV Universal Fit Stick-On Lens (Pack of 4) Pls clean your original car side mirror with alcohol or some other cleaning products. Press down HARD when the mirror is stick to the black pivot base, it is more firmly stick and will not fall off from the pivot base. 4 piece packaged, newest upgrade 360 degree rotate + sway adjustabe, maximize your view with wide angle in car. All convex spot mirrors are equipped with tiny adjustable swivel mounting bracket for easy installation. 2" HD glass curved male face frameless ultrathin slim design, equip with 3M adhesive for pressure-sensitive tape installation. IP65 waterproof, rust resistant and the glass will not haze. Suitable for interior or exterior use. Flexible convex shape of blind spot mirror helps you to forecast the next surroundings when passing or changing lanes. Install and test within seconds, 2 for your rearview mirror, 1 for your inside rear-view mirror, 1 for standby. All universal vehicles car fit accessory, MUST have for every truck, car, SUV, RVs and vans. PLS NOTE: this item do not fit for motorcycle.