seamhair is a fast growing manufacturing company that specialises in hair extensions (including Clip in hair extension, Tape in hair extension, Keratin tip hair extension, Hair weft and Accessories), so is ideally placed to address any OEM/ODM hair extensions requirements. We have more than 10 years' experience in producing quality hair extensions, in volume, to a worldwide customer base.seamhair factory founded in 2005. Today we are supplying hair products and OEM service to many clients with well-known brands in America, England, Italy and Australia.