Comparison : Item # M1-280-PGB, Clinical Regulator with CGA-280 Nut and Nipple Inlet
Item # M1-320-PGB, Clinical Regulator with CGA-320 Nut and Nipple Inlet
Item # M1-950-PGB, Clinical Regulator with CGA-950 Yoke Inlet
Item # M1-500-PGB, Clinical Regulator with CGA-500 Nut and Nipple Inlet
Item # M1-973-PGB, Clinical Regulator with CGA-973 Yoke Inlet