Certificate for raw silk (5A~6A) Produced Ny Silk Road Holding Group Huzhou Zhejiang No 2 Factory co,ltd Raw silk : 5A,6A Certificate for raw silk (5A~6A)Produced Ny Silk Road Holding Group Huzhou Zhejiang No 2 Factory co,ltd Raw silk : 4A 5A,6ASpec: 20/22d,27/29d,40/44dOthers organzine silk , twist silk 20/22D,27/29D,40/44D