Graybar Electric Supply 1370 Valley Vista DrSte 100Diamond Bar, CA, 91765 View Phone & Locations 909-451-4300 Fax: 909-451-4689 Toll Free: 800-766-7723 1370 Valley Vista Dr, Ste 100Diamond Bar, CA 91765 2205 Mount Vernon AvePomona, CA View Website Experience & Reliability About Connect with this Business: Send to My Email Send to My Phone Print this Page