Description: Wear polarized sunglasses to see the test card; you will see the hidden pattern This is the most convenient and fast way to judge whether the polarized sunglasses is authentic Take it and distinguish the real polarizer Material: Hard Paper Card External Card Size: Approx. 6*3.8cm/2.4*1.5inch Internal Testing Card Size: Approx.2.5*4.5cm/0.98*1.77inch Package Includes: 100 Pieces Testing Cards
