V850, 14", Stainless Steel, Door & Gate Spring, Adjustable Tension, Designed To Close Doors & Gates Automatically, Spring Is Self Closing, Closing Tension Is Adjustable, Use 14" Size For Heavier Applications, Triple Protected Finish For Extra Corrosion Protection, Mounting Screws Included, Manufactured From Hot Rolled Steel, Visual Pac, When Subjected To 312 Hours Of Salt Fog Spray Testing BHMA A138.18, Zinc Plated Hardware Showed Severe Corrosion While Hardware With Weather Guard Protection Withstood These Harsh Conditions With Very Little.