Basic Grade rubber sheet is a standard grade rubber sheet of rubber sheet that begins to use pure rubber used in the production of rubber sheets. This will have various properties of the rubber sheet is greatly increased, such as the toughness of the rubber sheet. Tensile strength tear resistant resistant to abrasion resistant to shock, etc., however, the various properties The type of rubber sheet depends on each type and usage of the rubber sheet as well, such as NR Rubber Sheet, EPDM Rubber Sheet, NBR Rubber Sheet, CR-Neoprene Rubber Sheet Chang Rubber : Basic Grade. Standard grade rubber sheet. Which features in the use of grade rubber produced from 100% real latex, this is still not very high. However, it is still a grade that is used by many people. which also has tires made from 100% real latex with higher properties and grades