16 inch length, width 50 mm (1.97 in), steel wire diameter 3.8 mm (0.15 in), nail length 30 mm (1.18 in). Solid high carbon steel tempered no-sag loop spring for durable seating support and lasting comfort. Key benefits - Durable construction: tempered high carbon steel resists wear and sag for dependable performance. - Strong support and comfort: no-sag loop design maintains seat firmness over time. - Versatile applications: suitable for seating in furniture upholstery, automotive seats, and other seating projects. - Installation notes: spring has high elasticity; two people stretching or the use of tools is recommended for proper installation. - Cost-effective repair: helps restore your sofa or chair at a lower cost than full replacement. Usage scenarios - Replacing worn springs in a sofa or upholstered chair to restore original feel. - Restoring cushion support in a vehicle seat for improved comfort during drives. - Upholstery projects or other seating repairs in home, workshop, or office environments.