Our Large Volume and Custom Sales department may also be contacted by the following methods: Mail Thermo Fisher Scientific Large Volume and Custom Sales P.O. Box 117 Rockford, IL. 61105 U.S.A Telephone U.S.A 1-800-874-3723 International +815-968-0747 Fax U.S.A 1-800-842-5007 International +815-968-4736