Specifications: Product substance: Premium Marine-Grade 316 Stainless Steel / accuracy heavy-duty die-casting -piece molding face process: Fully automated heavy glass polishing. Features: Robust Marine Grade 316 Stainless Steel: Crafted from premium marine grade 316 stainless steel for outstanding execution against rust, salt fog, and harsh weather; maintains integrity during prolonged exposure to seawater, salty winds, and intense sunlight without tarnishing or weakening.