... front / full lace / full injected PU3. Lace material color: light brown, medium brown, dark brown, transparent ect4. ... .2cm, 3.5cm. 12. gray hair: (kanekalon or human )gray hair, percentage according to clients requet. 13, hair color: black color ( #1, #1b, #2, ... #3, #4, #6, #8 ect),14. advantage: undetectable hairline, natural looking. top quality human hair ...