Material: Made from 304 stainless steel. This material is known for its resistance to corrosion in many environments. Specifications: The spring has a wire diameter of 1.8mm. Outer diameter options range from 10mm to 27mm, and free length options range from 100mm to 500mm. Please select the specific dimensions required. Spring Type: This is a helical compression spring, designed to resist a force applied along its axis and return to its original length when the force is removed. Surface Finish: The standard finish is untreated (mill finish) 304 stainless steel. Typical Applications: Springs of this type and material are commonly used in mechanical assemblies, industrial equipment, and other applications where the properties of stainless steel may be considered., Manufacturer: SYLALE