Bryan Tool Designers 401 N Union St Spectrum Design Group, Inc - Providers of plastic and rubber injection mold design for the tooling industry. Specialists in plastic product design and 3d surface development. Bryan OH Tool Designers Spectrum Design Group www.spectrum-design.com spectrum spectrum-design sdgi plastic injection molds injection molds mold design molds tooling tool design plastic design plastic part design design design group plastic molds rubber molds rubber injection molds plastic engineering engineering mol spectrum spectrum-design sdgi plastic injection molds injection molds mold design molds tooling tool design plastic design plastic part design design design group plastic molds rubber molds rubber injection molds plastic engineering engineering mol Business Reviews Spectrum Design Group Testimonials