Made of high quality silicone.Card cling and holder with adhesive on the back, no sticky residue left while removing and switching another piece. Works with Most Cell Phone Case.Computer back, Car window, Car dash, Refrigerator door or home front door.Holds any cards in place, non-slip. The price includes the shipping cost to CA.Replace your bulky wallet with a phone lightweight and thin wallet, easily holding your ID Card, Credit Cards, Pouch Card, etc.Great gift and giveaways for institution, school and birthday party.