United States Gilson, Inc. 3000 Parmenter Street P.O. Box 620027 Middleton, WI 53562 Tel. 608-836-1551 or 800-445-7661 Fax: 608-831-4451 e-mail: sales@gilson.com	Canada Mandel Scientific Company Inc. 2 Admiral Place, Guelph, Ontario, N1G 4N4 Tel. 888-883-3636 Fax: 519-763-2005 Web: http://www.mandel.ca e-mail: info@mandel.ca
Puerto Rico Gilson, Inc. 3000 Parmenter Street P.O. Box 620027 Middleton, WI 53562 Tel. 608-836-1551 or 800-445-7661 Fax: 608-831-4451 e-mail: sales@gilson.com