Thermaltronics M6B325 Bent Sharp 30deg 0.4mm (0.016") interchangeable for Metcal STTC-040 Temperature: 600 Series For Use With: TMT-9000S-1, TMT-9000S-2, MX-500, MX-5000, MX-5200 Tip Style: Bent Sharp 30deg Tip Width: 0.02" (0.40mm) Tip Length: 0.63" (16.00mm)