Contact information

Optimal Supply — an Optimal Facility Services company

 

Mailing address: 621 E North Street, Kalamazoo, MI 49007, United States

 

Phone: 269-626-9095

 

Email: ct@investeraholdings.com

 

Customer service hours: Monday-Friday, 8:00 AM-5:00 PM Eastern. We respond to all inquiries within one business day.