RFID card made of bamboo - RFID card made of bamboo - Anti-skimming RFID card in a bamboo case. Using an electromagnetic field, it protects all 13.56 MHz cards (bank or credit cards) against electronic theft at a distance of 2-3 cm around the card. (1.3mm). Bamboo is a natural product, so there may be slight differences in color, pattern and size.