The Kantech P20DYE IOProx 26 BIT Wiegand cards are top-notch proximity cards that work seamlessly with ioProx readers. These cards are highly secure and dependable, as they are double encoded with 26-bit Wiegand and Extended Secure Format. Product Features:Sold in packs of 50CR80 card size (86mm x 54mm)26-bit Wiegand and XSF format