These high-quality compression springs are designed to replace the original springs on your 3D printer bed, providing enhanced tension and stability for more precise and secure bed leveling. Made from durable, wear-resistant steel, they are stronger and more durable than traditional springs, reducing the need for frequent adjustments. Each spring measures 20mm (0.79 inches) in length, with an outer diameter of 8mm (0.31 inches) and an inner diameter of 4mm (0.16 inches). These yellow springs are compatible with popular 3D printers such as Creality Ender 3, Ender 3 Pro, Ender 3 V2, Ender V2 Pro, and more. Package includes 8 springs. Be sure to verify size before purchase!