This is a 50mb regulator and NOT a 37mb.  We have 37mb Propane regulators on our Regulator page.

High quality, single stage Cavagna 50 Mbar Regulator with propane gas inlet fitting (POL) with a 8mm rubber hose outlet.

1.5kg/hr flow rate

This regulator is a great replacement for the older German and American Motorhomes that require 50mb regulators not the current 30mb type.