To contact GTI through this interface you must be logged in to this system and also have been verified as a customer.  If you have not yet been verified, please register and wait for our email confirming you as a customer.  The confirmation process is generally performed within a day.

You can always contact us by phone and email

Telephone: +1 (630) 325-5848
Facsimile: +1 (630) 325-5849