Features: Engineered with high strength steel, these 2pcs tilt mechanism tension spring deliver support for heavy duty furniture, preventing deformation under prolonged weight stress. Featuring an adjustable spring mechanism and easy installation, this furniture accessory adapts to various project while ensuring mute operate. Ideal for enthusiasts and furniture manufacturers seeking sofa bed spring that maintain structural integrity in humid environments like kitchens or bathrooms. Enhances stability in reclining chairs, modular shelving units, and adjustable bed frames where customizable tension and rust proof performances are important. Precisions crafted with noise dampening technology, these furniture tension spring combine industrial grade durability with effortless adaptability for home renovation and commercial installations. Specifications: Component: Steel Size: about. 13cm/5.12in Package Includes: 2pcs Extension Spring note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.