By e-mail:

Sales - sales@sumdex.com
Shipping - alex@sumdex.com
Support - customerservice@sumdex.com
Returns - sales@sumdex.com
Website - customerservice@sumdex.com
OEM/Custom Cases - sales@sumdex.com
Accounting/Administrative - lydia@sumdex.com

By phone:

626-820-5889 or 888-SUMDEX-1 (toll free)

By fax:

626-820-5885

By mail:

Sumdex, Inc. (USA)
13460 Brooks Drive
Baldwin Park, CA 91706