Comparison : Item # M1A-540-P, Single Stage Preset Regulator with CGA-540 Nut and Nipple Inlet with Horizontal Outlet
Item # M1A-540-PH, Single Stage Preset Regulator with CGA-540 Handtight Nut and Nipple Inlet with Horizontal Outlet
Item # M1A-870-P, Single Stage Preset Regulator with CGA-870 Yoke Inlet with Horizontal Outlet
Item # M1-540-P, Single Stage Preset Regulator with CGA-540 Nut and Nipple Inlet with 90 Degree Outlet
Item # M1-540-PH, Single Stage Preset Regulator with CGA-540 Handtight Nut and Nipple Inlet with 90 Degree Outlet