10pcs Spring For 3D Printer Extruder Heated Bed Ultimaker Makerbot

Features:

Super elastic
On the surface of nickel plating processing， have better corrosion resistance，
and surface hardness
The wire diameter: 1.2mm
Inner diameter: 5mm
Outside diameter 7.5mm
Height: 20mm
Material: stainless steel
circle number: 9

Package included:

10 x Spring