polarized sunglasses test card 1. test domo polarized sunglasses 2. Hidden image inside is invisiable to regular sunglasses Polarized test card;polarized sunglasses display card1. Used to test domo polarized sunglasses2. Hidden image inside is invisiable to naked eyes or regular sunglasses3. Partern & Size are customized4. Single or Multicolor words and image all available5. normal size is 9*12cm ...
