5/8"OD gas fittings - 3/4"MIP (1/2"FIP tap) and 3/4"FIP. Kit contains: 5/8" OD flare x 3/4" MIP (1/2" FIP tap) fitting and; 5/8" OD flare x3/4" FIP fitting. Adapts gas connector flare nut to gas supply or appliance inlet. Steel construction with corrosion resistant coating