Description: 【Premium Material】: This freeze plug kit is crafted from quality brass, known for its rust resistance compared to standard steel plugs. The screws are made of carbon steel, ensuring long term performance even in challenging environments 【Comprehensive Kit】: The package includes brass freeze plugs, providing a complete solution for replacing damaged or old engine components 【Vehicle Compatibility】: Specifically designed for Chevrolet small block engines with displacements for 283ci, 305ci, 327ci, and 350ci from the years 1957-1997. Ensure compatibility by verifying the number before purchase to avoid any fitment issues 【Optimal Dimensions】: The kit features two different plug sizes, gold plugs with a diameter of 4.2cm/1.65inch and silver plugs measuring 5.4cm/2.13inch in diameter, catering to various engine requirements 【Compact Packaging】: Delivered in a compact package measuring 12cmx11cmx3cm/4.72inchx4.33inchx1.18inch, this xpansion Plug Kit is easy to store and transport while ensuring all components are securely contained until installation is required Size Chart: Gold diameter 4.2cm/1.65inch Silver diameter 5.4cm/2.13inch Package Includes: 1 Freeze Plug Kit  Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.