1. THE PLASTIC
HEAD IS MOLDED WITH PU RAW MATERIAL. IN THE MARKET, MOST OF THEM
IS MOLDED WITH PVC
2. THE COIL
CORD IS MOLDED WITH PU ALSO.
3. INSIDE THE
COIL CORD, THIS IS MADE OF TINSEL WIRE.
THE ABOVE OF THREE POINTS CAN BE MADE THE LIFE OF
COIL CORD BECOME LONGER
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