Sumal has Certification ISO 9001
ISO 9001 is the international standard for a quality management system.
In order to be certified to the ISO 9001 standard, a company must follow the requirements set forth in the ISO 9001 Standard. The standard is used by organizations to demonstrate their ability to consistently provide products and services that meet customer and regulatory requirements and to demonstrate continuous improvement.
You can verify that Sumal has iso 9001.