Thermaltronics M7CS152 Conical Sharp 0.4mm (0.016") interchangeable for Metcal STTC-122 Temperature: 700 Series For Use With: TMT-9000S-1, TMT-9000S-2, MX-500, MX-5000, MX-5200 Tip Style: Conical Sharp Tip Width: 0.02" (0.40mm) Tip Length: 0.33" (8.50mm)