ELK PRODUCTS M1PRC ELK PROX CARDS 10 PACK Review Gobling June 13, 2018 August 29, 2018 No Comments on ELK PRODUCTS M1PRC ELK PROX CARDS 10 PACK Review This fits your . Make sure this fits by entering your model number. Elk ELK-M1PRC Proximity Card for use with M1 Proximity Readers