Usage Tips:These sofa bed parts are designed to restore thecomfort and support of your furniture. The springs are easy to install and fit seamlessly into various types of furniture, including sofas, chairs, and beds. Their robust design ensures they can handle the weight and pressure of daily use, providing a solution.Features-Color:Black-Material:Steel-Size:10.00X10.00X10.00cm/3.93X3.93X3.93in-Enhanced comfort: high elasticity design offers sturdy comfort and support, improving your seating experience-Robust construction: made from materials that ensure longevity and prevent deformation, extending furniture life-Stable seating: independent spring structure isolates vibrations, delivering a stable and comfortable seating experience in any setting-Effortless installation: easy to install, these springs can old ones, revitalizing your furniture and improving its -Multifunctional: suitable for a variety of furniture including chairs, mattresses, and sofas, meeting diverse requirements for a cozy homePackage list: 10pcs x Upholstery Springs