The pack includes a sufficient quantity of 12 springs, ensuring you have enough ; Whether it's for a single project or multiple, this pack accommodates most of your spring needs. Each spring measures 0.39 inch wide and 2.8 inch long, making them suitable for various machinery repair, industrial, garage door, and DIY projects.This proper size design ensures versatility across a range of tasks; Whether you're working in industries, repair tasks, research, or maintenance, these springs are your ideal solution. The coiled design allows these springs to provide consistent tension and support for various applications. featuring a double hook design, these stainless steel springs provide stability; The symmetrically designed hooks at both ends easy installation and secure fastening on the mechanical equipment. These 12 extension springs are made from 0.047 inch spring steel with dual hook ends for secure attachment and long-lasting performance. They are designed to withstand significant tension and bouncing back without losing shape, thanks to their wear , heat , material. With pre-formed hook ends, these springs can be easily installed without the need for additional tools or modifications. These are suitable for multi purpose use, whether it's in mechanical industries, research, furniture, appliances, work, gates, screen doors or repair items; Their flexibility and utility make them a staple in your toolbox. Colour:Silver Material:Metal Package Contents: 1set * spring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.