Zig Zag Furniture and Auto Upholstery oil-tempered Springs &ndash; 12 gauge 10&rsquo; length roll - made in the USA HotSign Products is the sole supplier for this product. Compare ours to non-oil-tempered springs (see photos) 10 LENGTH ROLL - you may cut to the size(s) you need for the job Perfect for seat and furniture restoration (recliners, sofas, truck and auto bucket and bench seat backs) Only HotSign springs are guaranteed 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 LIGHTER 12 GAUGE is used for seat BACKS; heavier 9 and 11 gauge are used for seat cushions. See image for gauge comparison.