These brushes are produced for electrolytic pickling and use with mordants Selected from metal for durability These brushes are used for cleaning / pickling welds or aluminium welding processes With the available fluids, you can also use for passivation and marking For longer stands you should use in tube ( PTFE) and keep the working end as short as possible Carbon fiber brush / acid scrubbing brush to clean welds You can use these brushes to erase tempered colors from the welding process of stainless steel V2A / V4A / AISI 206 / AISI 304 / AISI 316 or have been quenched and tempered, Manufacturer: Kaeltsyn