Sewing machine rotary hook HSM-A1(6-7) Dia.: 7.94 mm We are hook and bobbin case factory which can supply different level products( normal Teflon coating DLC coating, Nano no oil coating and so on ,our capacity is 3 million pcs hook/year and 5 million pcs bobbin case/year /we also deal with all kinds of sewing machine spare parts (please send us the international code and we will reply you the price ) Hope we can build up long-term business and grows up together. .