... usage 1. sisal fibers, with long and white color,2. strong and pliable, good tension, high friction resistance, ... high acid and alkali resistance to corrosiveness,3. widely utilized ... polishing buff, carpet, pulp, building materials, doormat and other different kinds of products. The executive standard of ... REGAIN A GRADE≥95≥880≤2.5≤13 B GRADE≥85≥830≤3.5≤13 C GRADE ...