Features: The die springs are made of imported alloy steel material. 10pcs Die Springs. Compatible with most 3d printer, strong and durable to keep the hot bed level. Compatible with Creality CR-7, CR-8, CR-10, CR-10 S4, CR-10 S5, for Anet A8, E12, E10, ET4, for Anycubic i3 Mega, Chiron 3D printer. Surface hardening treatment more than twice, pressure treatment more than three times, eliminate the use of internal stress, make the spring more stable and durable. Use electrophoretic paint to color, with exquisite appearance, uniform color and lustre, no paint falling and no decolorization. Specifications: Material: Imported Alloy Steel Item Size: 10 * 25mm / 0.4 * 1.0in Outside Diameter: 10mm / 0.4in Inner Diameter: 6mm / 0.2in Package Size: 8.0 * 6.0 * 1.0cm / 3.1 * 2.4 * 0.4in Package Weight: 40g / 1.4oz Package List: 10 * Die Springs