... 4.Corrosion resistance and no abnormal chemical YONGFA SILICONE VACUUM TUBE has good chemically and physically stable, they are ... in apperance,Aging resistant and Corrosion resistant. These silicone vacuum tubes can be applied in the oil,are, steaming pipelines ... color you want. ItemStraight hoseStraight reducer hoseHump hoseElbow 45°,60°,90°,135°,180°Radiator hoseVacuum hoseBraided hose Turbocharger ...