Our line of credentials similar and compatible with the Keri MS format. Compare these fobs, cards, adhesive tags and wristbands with Keri?s PKT-10X, MT-10XP and KC-10X products. This line of 125 KHz RFID credentials work with the Keri systems readers such as MS-3000X, MS-5000X, MS-7000X, MS-4000X. These credentials DO NOT WORK WITH Keri NXT readers and products! FORMAT: 200 Compatible with Keri MS Format APPEARANCE: 2.125mm" x 3.370mm" x 0.030mm" blank white printable CR80 keyless entry cards INFORMATION WE NEED FROM YOU Facility Code: Be sure to let us know what facility code you need Id number range (Card number range) AuthorizID offers a wide variety of proximity technology. When purchasing from AuthorizID you are doing so with the peace of mind that you will also get free technical support to get your fobs programmed into your system from a team that has over 16 years of hands on experience with security systems and software. Not only are we here to help you program your products, but in the rare event that you purchased the wrong item we are here to guide you in the direction of compatible products for your system/software. FREE SAMPLES AVAILABLE: Not sure what cards/fobs work with your system? Contact us and request a free sample. You can do this by clicking the “Contact Seller” link on the far-right side of the listing in the “Seller Information” box. Leave us your name and shipping address and we’ll get some card samples and instruction on how to take advantage of our technical support team shipped to you absolutely free, no risk. Your sample will contain 3 different cards that have common formats. Odds are, we will get one of them working with your system. TECHNICAL SUPPORT- Receive free technical support programming your cards from our highly experienced technical support team. Not sure if this is right? We have free samples! THANKS FOR SHOPPING. WE LOOK FORWARD TO WORKING WITH YOU!