What card is used in SLEX?

Could you please clarify what you mean by "SLEX" and the context in which the card is being used? If SLEX refers to a specific service, system, or platform in the world of cryptocurrency or finance, it would be helpful to know which one. Generally, in the realm of finance and cryptocurrency, there are various types of cards used, such as debit cards, credit cards, or prepaid cards, which allow users to access and spend their funds. However, without more specific information about SLEX, it's difficult to accurately describe the type of card used. Could you provide some additional context or details about SLEX and the card you're inquiring about?