Our silicon carbide tube brush is designed for polishing internal channels inside hydraulic valve blocks. Its slender structure can go deep into narrow internal pipelines to eliminate micro burrs, tool marks and residual metal particles. Moderate cutting force ensures smooth inner surfaces without damaging precision sealing areas. It adapts to automated CNC processing and provides stable finishing results for mass production. Well-polished flow channels prevent debris blockage, enhance hydraulic oil circulation and improve the reliability of the entire hydraulic system.