It is made up of highly polished finish stamped 304-grade stainless steel. Removable outer cap for cleaning and maintenance or for pressure testing. It is highly durable stainless steel, rust and corrosion resistant, sturdy and long-lasting life, has a rush finish surface, an aesthetically pleasing appearance, Great for boats, vents, yachts, etc, can easily be installed and removed for cleaning and maintenance or for testing. Dimensions: For 5/8" inside diameter hose. Package Includes: 1 pc of Marine City 304 Grade Stainless Steel 90-Degree Fuel Tank Vent Round Head.