M style couplers feature a case hardened steel drag guard to prevent accidental uncoupling. The 1/4 hose barb connection makes this an ideal coupler for hose repair or producing your own hose lengths. M style couplers have a basic flow size of 1/4 and offer up to 300 PSI. 40 SCFM. Product Features:Female adapterMaximum of 300 pounds per square inchAir flow of 40 standard cubic feet per minuteMaximum recommended temperature of 250 degrees Fahrenheit