This 200pcs Compression Spring Assortment set a comprehensive selection of 20 specifications, ensuring you have the perfect spring for any project or repair Crafted from spring steel, these Spring come in various lengths ( 10mm, 15mm, 20mm, 30mm) and diameters ( 5mm, 6mm, 7mm), with six different leveling of elasticities to meet mechanical needs Each spring in the set is meticulously engineered to provide consistent, making it addition to your toolkit for maintenance, prototypes, and job where Precisions and durability are Suitable for enthusiasts, professional mechanics, and hobbyists alike, this spring set is designs to cater to a wide ranges of users seek Stable components for their Creation and fixes Whether you ' re working on home improvement projects, automotive repairs, or electronic gadgets, these Multifunction Spring are essential for applications requiring precise compression force, Manufacturer: Kaeltsyn