Automotive Interior & Exterior Trim | Sigma International | United …
Automotive Interior & Exterior Trim | Sigma International | United … Sigma International, headquartered in Livonia, MI USA, is a global automotive supplier specializing in the integration of decorative interior and exterior trim with electronics. We … Sigma International, headquartered in Livonia, MI USA, is a global automotive supplier specializing in the integration of decorative interior and exterior trim with electronics. We …