10pcs Spring For 3D Printer Extruder Heated Bed Ultimaker Makerbot
Features:
Super elasticOn the surface of nickel plating processing， have better corrosion resistance，and surface hardnessThe wire diameter: 1.2mmInner diameter: 5mmOutside diameter 7.5mmHeight: 20mmMaterial: stainless steelcircle number: 9
Package included:
10 x Spring