The Marshall Excelsior MEGR-253P Excela-Flo Propane Regulator is a high-quality and RV-approved propane regulator designed for vertical installation. With an inlet size of 1/4 inch and an outlet size of 3/8 inch, this regulator provides an outlet pressure of 11 inch WC. Made of durable zinc material, this regulator is manufactured in the United States and comes with a 2-stage design, offering reliable performance with a BTU level of 225000 BTU/150000 BTU. It is essential for maintaining a safe and efficient propane system in RVs and trailers. 2