Custom Flat Zigzag Spring 3.0mm 3.8mm 4.0mm High Carbon Steel Sofa Upholstery Spring Cut to Length Supplier Product Specifications Product Name Zigzag Spring Style Curve / Semicircular / Flat Wire Diameter 3.0-4.0mm Color Black Or Customized Arc Height 30-250mm Place of Product Guangdong Province, China Width 16-35mm Usage Home Furniture Length Customized OEM/ODM Acceptable Product Overview Zig zag springs are manufactured from hardened spring steel wire and supplied to sofa