10PCS 0.31 in OD 0.78 in Length Compression Springs Light Load for Creality CR-10 10S S4 Ender 3 3D Printer Heatbed Springs
https://www.vogueparade.com/shopping/EN/200185144/1/1005003463684416/10pcs-031-in-od-078-in-length-compression-springs-light-load-for-creality-cr-10-10s-s4-ender-3-3d-printer-heatbed-springs//