... yarn 2) Specification:20/22D,27/29D,40/44D, 3) Grade:3A ,4A,5A,6A raw silk and twist silk yarn ... 's silk manufacturing subcompany :Huzhou Zhejiang No2 Factory make the highest grade raw silk. 1. material: 100% mulberry raw silk2. specification: 20 ... /22D f2 S330 44”50g20/22D , F2,S800-Z800, Grade : special grade .we sincerely invite buisnessmen from domestic and foreign markets to ...