Contact and Ordering Information
Toll Free: 888-MATHKAL (628-4525)
International: 763-323-8257
Customer Service: 763-323-8257
Fax: 763-323-8222
Email: info@mathkalusa.com
Postal Address:
4:20 Communications, Inc.
P.O. Box 421027
Minneapolis, MN 55442-0027
