Material: The self closing gate door spring is made of carbon steel, prevents corrosion, durable for long time use. Application: The gate spring closer is widely used for various doors, vinyl fences and gate latches, which can prevent you from forgetting to close the doors. Design: Self closing outdoor gate spring designed for automatic closing gates, doors, and vinyl fences. Adjustable spring tension for light to heavy duty daily use. Easy to Use: The matching fittings make your installation more convenient. Package Includes: 1 13" Spring door closer, 2 locating pins and 1 adjusting pin and 4 screws. Specification: Material: Carbon Steel Color: Black Size: Overall Length 36cm/14.17inch Package Includes: 1 Spring Door Closer (With Screws Fitment) Note: Please allow slightly errors due to manual measurement and different monitors.