This standard size CR 80 cleaning card for Parking Meters is saturated with Green-e Certified solution biodegradable, non-carcinogenic, non-toxic, non-flammable and 100% alcohol free! and only we have them!! Designed to safely and effectively remove all dirt, magnetic oxides, oils, lotions, and other contaminants from all types of concealed magnetic, chip reader mechanisms. Card Readers require preventative maintenance for keeping the magnetic heads or chip reader clean and debris free from contamination build up. Saturated Cleaning cards are a cost effective way to maintain your card readers and increase the service life of the chip and magnetic head reader.