Premium Material: The threaded inserts for 3D printing are made of high quality brass, High strength without deformation, abrasion and resistance and with beautiful and practical, also can withstand high temperature above 300°C / 572°F. Excellent thermal conductivity also makes your 3D printer to work more effectively. Multiple Standard Sizes: We prepare various sizes for to meet all your needs. In this kit, you get 362pcs M2 M3 M5 M6 female knurled nuts in different lengths. plastic boxes are in any way, and all parts are in their compartments to prevent mixing during portation. Firm Hold & Easy to Use: These heat set inserts can be widely used on the moulding for tightly fixing. Can be installed by ultrasonic or heat into thread tapered hole, or molded in during . Also apply to circuit board assembly and in of electronics. Using a normal soldering iron, you could easily set them into 3D printed holes. Threaded Inserts: Deep thread, neat and clean, not easy to strip during rotation, stable and reliable. Convenient operation, good texture, greatly improve your work efficiency Wide Applications: These heat set insert are suitable for various plastics and can be inserted in tapered holes by heating or ultrasonic, as well as by molding. such as PC, PA, PLA, ABS, PETG, etc. Suitable for installing on 3D printers, electrical molding machines, electrical molding, automotive or laptop molding plastic shells, etc. Material: brass colour: gold Package Contents: 362 x Nut Inserts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.