Hypertherm cartridge: SmartSYNC or adapter 30-45 A mechanized FineCut Part number: #428926 FineCut cartridges produce a narrower kerf on thin mild steel and stainless steel up to 3 mm (10 gauge) which is ideal for fine detail cutting. To maximize cartridge life and performance it is important to select the cartridge that is optimized for the workpiece you are cutting.