... SpecifIcation1.SpecifIcation:L=70MM50mm2.Turnable Base 180 degree,Marine Hardware,Marine Hinge,Marine cleat,antenna ... investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process.2. Materials: stainless steel ... turning, milling, drilling, thread cutting.5. Surface treatment: glass rays electrolytic polishing, coating, varnishing, bromzing. Passivating, grinding, ...