La description

SVR CV*0 meets standards and must be dry, clean, and elastic. Sheets with oxidized spots, scorched and raw spots will not be accepted.
Dry mold no more than *0%, clean, dry, elastic, scattered with air bubbles, small sized bark is accepted, no sand, no foreign matter, no living matter

Because CV (constant viscosity) rubber has the characteristic properties of constant viscosity and flexibility, it is favored by manufacturers. Flexibility is very advantageous in the rolling process (such as low energy, good synthesis of substances in the mixture, high adhesion) which will create a good and uniform product.

This type of rubber is often used to make elastic bands, glue, tire sidewalls, table tennis rackets...