For use in a variety of applications; appliances, automotive, marine, toys, tools, mechanical devices, contraptions and more These extension springs are designed with double loop closed ends for easy and reliable fastening to fixed and moving parts Spring dimensions: 1 inch outside diameter, 7 inch length, 0.135 inch wire diameter, 69.9 lbs. maximum safe load, 2.93 inch maximum deflection All springs come in a beautiful, corrosion resistant, nickel plated finish allowing them to be used both indoors and out Constructed of durable spring steel (tempered steel wire) to provide optimum retraction when stretched