1.6 mm stainless steel welding rods are thin, stainless steel rods that are used for welding stainless steel materials. They are typically used for welding thin materials, or for making precise welds in hard-to-reach areas. The 1.6 mm diameter is a common size for these rods, but they are also available in other sizes to suit different welding applications. Stainless steel welding rods are preferred for welding stainless steel because they provide good corrosion resistance and can produce strong, high-quality welds. However, it is important to use the correct rod for the specific grade of stainless steel being welded, as different grades of stainless steel have different welding characteristics.