Description The Binzel MB25 H/D (M6 Thread) contact tip is designed for medium weight fabrication and welding of heavier materials. This can include sheetmetal work and general steelwork applications. The M6 thread contact tip is also available in 0.8mm & 1.0mm. These tips are designed for use with the MB25 & MB36 mig torches for welding with a range of materials including mild steel, stainless steel and aluminium.