612-4326, Metcal, Metcal STTC 1.78 mm Chisel Soldering Iron Tip for use with MX-H1-AV, MX-RM3E, Brand Metcal, Tip Shape Chisel, Model Number STTC, For Use With MX-H1-AV, MX-RM3E Metcal STTC 1.78 mm Chisel Soldering Iron Tip for use with MX-H1-AV, MX-RM3E