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if you like my video please help me like and share Click to subscribe and small bell. thank you. : ) Purchase link ： A lot of people ask me where to buy the spring. Amazon sells it. Then there are some self-made ones. I write down the web address below. There are some tools I use. Creality K1 Speedy 3D Printer Ender 3 Filament akm screw spring kit spring wire drill 1mm-13mm file #zvc #3d printing #3d printed