Made of silicone material, with back adhesive sticker to stick it to the smooth back of your phone. Easy to use just peel off the cover of the sticker and stick to your phone back, and finish by softly pressing. Suitable to fit up to 4 cards, such as: ID card, credit cards, driver’s licence, business cards, membership card, insurance card, discount card, frequent flyer card, etc. Silicone card holder for back of phone, can also be used to store money, charging cable, earphones, flash drive, cigarette lighter, etc. The price includes shipping cost to CA. Quantity over than 10000pcs by ocean. 100% guarantee for quality. Great gift and giveaways for institution, school and birthday party. Customize your logo and promote your business.