These threaded insert kits, part of 3D printer accessories, come in various sizes, including M2, M3, M4, and M5, making them perfect for enhancing your 3D printed parts. They are suitable for parts of 3D printers like Anycubic, Creality, Bambu Lab, or Prusa. This set, an essential in any 3D printer tool kit, contains 100 M2*4*3.6, 200 M3