10pcs 3D Printer Accessory Extruder Strong Nickelplated Spring Carbon Steel Spring 9 Laps for Ultimaker Makerbot

Features: With 45 carbon steel, it has excellent elasticity and fatigue resistance. Nickel plating on the surface has better corrosion resistance and high surface hardness. It is suitable for 3D printer. Specifications: Number of laps: 9 laps Material: carbon steel Outer diameter: about 7.5mm/0.29\'\' Inside diameter: about 5mm/0.19\'\' Line diameter: About 1.2mm/0.04\'\' Height: approx. 20mm/0.78\'\' Quantity: 10pcs Note: Please allow 1-3 cm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding 10 x 3D Printer Extruder Strong Springs '