Quality Assurance Commitment

The VONTRONTM RO membrane elements should be used according to the specifications and procedures for design and operation set forth by Vontron Enviro-tech Co. Ltd. (hereinafter referred to as “Vontron”), and only on this condition will Vontron ensure the quality of RO membrane elements manufactured and sold by itself, and offer a three-year period of limited quality assurance, with its terms specified as follows: A. Guarantee of producing technologies and materials Vontron ensures that the RO membrane elements produced and sold by itself are integral and intact in respect of producing technologies and materials.