Ideal game for Select Trucks: Engineered to precisely fit specific truck models with original part numbers 77320 /773201670, guaranteeing proper fitment and smooth replacement. Enhanced Security Mechanism: Incorporates a robust locking design with provided keys to deter unauthorized access and accidental spills, offering improved safeguarding for your vehicle. Sturdy Metal Build: Constructed from resilient metal alloy to endure challenging outdoor factors, oxidation and maintaining long term . Effortless Setup: Designed for straightforward installation without requiring concentrated tools, enabling quick exchange of existing cistern covers and reducing maintenance time. Built for Commercial Trucks: Tailored for certain heavy duty vehicles, this cistern cover adheres to rigorous sealing and requirements, helping maintain your truck's optimal operations.