How to Apply 6D Hair extensions ? 
In this video , it's 6d 2 generation hair machine and apply 6D 2 generation hair extensions on head . 

6D 2 Hair method are very popular in China, just need 30-40 monutes you can do a full head . 

Attention : When you buy 6d-2 generation hair extensions, please buy 6d-2 hair machine , can't use 6d-1 hair machine.
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