100 Pack Clear 2-sided Horizontal Multiple ID card Holder 1840-3050 2-compartment rigid card holder with slot and chain holes. Front holds one standard credit card size ID up to 32 mils. Back holds up to 3 credit card size ID cards or 7 standard business cards, up to 90 mils. total thickness Horizontal, side loading. This holder is "open frame" style, i.e. the ID card is not covered by clear plastic.