Description: Using solid galvanized steel, rust-resistant and highly reliable, requires little to no maintenance.Heavy-Duty Rack SystemComes with 4pcs of galvanized steel gear racks (4 mtrs total), providing corrosion resistance and long-lasting performance.Operates quietly (≤45 dB) and reliably in -13°F to 131°F conditions.The rack-driven design ensures precise, low-maintenance gate movement for years.