Like our premium MaxxLife Butterfly valve, Utility by BTI offers: 35% more flow than standard ductile iron discs, a lubricated stem and o-ring seals for extended life, a lightweight aluminum body, and no hardware in the flow path to contaminate your load. And, ALL parts are 100% American Made. Utility featues a black Buna-N seat and ductile iron disc. Utility by BTI, more valve at the same cost of an import valve.