VERTO (Xiamen) Plumbing INC. specializes in the design, development ,production and sale of toilet tank fittings and other bathroom handware Our VIB trademark is registered in mainland China and our designs are patented. Source you bathroom hardware from us and you will be assured of products that meet the strict plumbing requirements of the US and Canada .Approved by the American Society of Sanitary Engineers (ASSE1002-1986), Canadian Standards Association (CSA B125) and Universal Plumbing