Feature: 1. The original metal extruder kit is stable and durable, has a long service life.2. This spring is an advanced upgrade kit for 3D printers, very practically. 3. These quick and easy installation springs can improve the performance and reliability of the 3D printer. 4. A large number, can meet your use and replacement needs, very practically. 5. Convenient to use and with good performance, with small size, easy to carry and store. Specification: Item Type: 3D Printer Parts Spring Model: Extruder pressure spring Package List: 24 x Spring |