The GRACO SE2B.0794 is a Saniforce EODD (Electrically Operated Double Diaphragm) pump, designed for hygienic and sanitary applications. While specific material details for this exact part number are not specified in available sources, GRACO Saniforce pumps are typically constructed from stainless steel and engineered for handling food, pharmaceutical, and cosmetic products requiring high cleanliness and reliability.