Marshall Excelsior MEGR-9984 LP Gas Regulator Marshall Excelsior Regulators and Accessories - As a running change, now has an increased rating of 380,000 BTU's A pressure tap has been added to make it easier for service technicians to adjust the pressure and check the system Also a larger indicator makes it easier to read if the cylinder has become empty 2 Stage Auto Change Over Regulator, 1/4 inch inverted x 3/8 inch Female Pipe Thread; Bulk; Auto change Bulk