The Full Port Electric Ball Valves Features a 316 stainless steel ball & stem, with stainless steel hardware. Fiberglass reinforced polypropylene and glass reinforced PTFE seats. Includes FKM (Viton™ type) or EPDM O-rings. All models are 12 volt DC operated. The maximum operating pressure is 150 psi maximum at 70°F. These units are easily repairable and are equipped with an open-close indicator. 1/4" - 3/8" have a 1/3 second response time.