2-Pack NEMA 17 Stepper Steel and Rubber Vibration Dampers for 3D Printer， CNC<img src="http://ecx.images-amazon.com/images/I/41Vo-IZy4zL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41PZd1IdFRL.jpg" noproxy>