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4-in-1 USB Magnetic Card Reader - Contactless/Chip/PSAM Card Reader & Writer - Plug & Play for Professionals (Ideal for Payment Systems, Access Control & ID Verification)

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BAOSHISHAN 100pcs Hiding Power Test Cards for Coatings - Black & White Opacity Test Cards for Covering Power Determination (Half Black, Half White) | Ideal for Paint Quality Testing, DIY Projects & Professional Coating Applications