raw silk 1) 100%mulberry raw silk 2) Specification:20/22D,27/29D,40/44D, 3) Grade:3A ,4A,5A,6A CIQ raw silk yarn 1 ... . material: 100% mulberry raw silk2. specification: 20/22D ,27/29D ,40 ... It is the raw material for the production of other silk yarns and fabrics. Our main specifications are 20/22D, 27 ...