A "skimmer" is a device used to secretly collect information from credit cards or other electronic payment methods without the owner's knowledge or consent. Full definition
Therefore retailers will need protein skimmers of different sizes for different applications and with or without dedicated pumps and associated connectors. (petbusiness.com)
You may not notice cheap credit card skimmers disguised as normal places to swipe your card when you travel abroad — but if you have an EMV chipped card, you have less to worry about. (mybanktracker.com)
My recommendation is to find a brand of skimmer with the most reliable pump and sell it to the exclusion of others. (petbusiness.com)