HotSign Springs Zig Zag Auto Upholstery Spring &ndash; 11 Gauge/10&rsquo; length piece 10 LENGTH ROLL - you may cut to the size(s) you need for the job. Cut sections must be straightened to match the spring being replaced. Spring bender tool information available upon request. Perfect for seat and furniture restoration (recliners, sofas, truck and auto bucket and bench seat cushions or backs). MADE IN THE USA since 1934 - composed of high-carbon, high-tensile oil-tempered spring wire used by manufacturers and producers of furniture and bedding, automotive and truck seating, plane and train requirements; theater seating, and other applications. THE 11 GAUGE springs are used for seat backs or normal-use seat cushions. See image for gauge comparisons.