10pcs SLE4442 with 2 Track Hi co Magnetic Stripe Composite PVC Card (Black)

how to differentiate magstripe cards magnetic striped cards are made with two or three tracks the two models are available with high and low coercivity coercivity is the strength of the magnetic field necessary to remove the magnetization these two types can be differentiated by the color of their stripe loko cards have a brown stripe and heiko cards have a black one loko cards are vulnerable to surrounding magnetic fields and are more likely to have their data erased by accident Piko cards are higher-quality cards capable of sustaining their data against stronger magnetic fields these heavy-duty cards are essential in environments such as factories or workplaces containing magnets the technology used on mag stripe cards is the same used in compact cassettes therefore the amount of data stored on the cards is extremely limited the first track can contain up to 79 alphanumeric characters