Cheap And Discounts 100pcs/Lot 125KHz RFID Tag EM ID TK4100/EM4100 Thick Card Access Control System Card RFID Card Wholesale. Buy Directly From Merchant Shenzhen Lanhong technology company. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.