NSF Registration of this product is current when the NSF Registration Number, Category Code, and Registration Mark appear on the NSF -approved product label, and the registered product name is included in the current NSF White Book Listing of Nonfood Compounds at the NSF website (http:www.nsf.org). The NSF Registration Mark can be downloaded from the NSF website, at the http:www.nsf.org/business/about NSF/nsf marks downloded.asp.