This suction cup with a built in super strong magnet charm is an industrial grade with built in ring to divert sun rays from forming a focal point and causes damages to your car interior. Attach it wherever you like and far enough from the rearview mirror if it has a built-in compass. The charm is made from strong clear Polycarbonate material that tolerates high heat. The magnet is a super strong rare earth grade N45. Use it anywhere on your windshield to hang any of our Mirortag or WinshieldTAG placard holders. Can also be used to hang on any glass to magnetically attach items to it. 2 included in the sale. Made in USA.