factory with over 1,500 employees 12 years RFID experience fine quality with competitive price various chips are available Specification:Material: ABS+PVCDimension: 85.6x54x1.8mm Operational Frequency: 125KHz/13.56MHz/915MHz Available Chip125KHz chips:TK4100, EM4100, EM4102, EM4450, T5577 (T5567 updated version), Hitag1, Hitag2, HitagS256, HitagS2048,13.56MHz chips:Mifare 1K, Mifare 4k, Mifare ...