Comparison : Item # 5256, GM Orifice 1/2" Tube Repair Kit
Item # 5279, R134a Low Side "T" Splice Service Port
Item # 5280, R134a Low Side "T" Splice Service Port
Item # 5281, R134a Low Side "T" Splice Service Port
Item # 5282, R134a Low Side "T" Splice Service Port