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Residential torsion springs with cones already installed, available in all wire sizes and lengths from 20 to 50 inches. These springs are 10,000-cycle rated oil-tempered or galvanized steel. This stationary cone and winding cone arrive pre-installed, so you do not have to press them on yourself. Pick your wire size, inside diameter, and spring length from the options. If you do not know your spring size, measure the wire with calipers, check the ID (usually 1-3/4 or 2 inches for residential), and measure the spring body length while it is relaxed. Contact us for sizes outside the standard range.