Kantech IoProx proximity card (standard shell card), XSF/26 bit Wiegand. For use with all ioProx proximity readers including the ioPass SA500 and SA600. Thin enough to carry in a wallet or purse. Dimensions: 2.125” x 3.375” x 0.070” (5.40 x 8.57 x 0.18 cm) - There is zero chance of you ordering cards or tags with the same numbers as ioProx cards are never duplcated at the factory - PACK OF 50 CARDS