Contact 
Minnesota Location
Corporate
Headquarters
V-TEK International
751 Summit Avenue
PO Box 3104
Mankato, MN 56001
California Location
Royce Instruments
480 Technology Way
Napa, CA 94558
Phone: (707) 255-9078
Fax: (707) 255-9079
Email Addresses
Sales: sales@royceinstruments.com
Customer Service: customerservice@royceinstruments.com