Package Included: You will receive a box of 240pcs threaded knurled brass nuts, including three sizes: M5, M4, M3, which can meet your daily needs well. Premium Material: Our M3 M4 M4 M5 thread inserts are made of the highest quality brass, which ensures good corrosion resistance and thermal conductivity, the advantages of heat resistance, oxidation resistance, hardness and durability, perfect for long term use. Very practical: The screw-on design ensures quick and stable insertion. Correct positioning without damaging the plastic. The opposed spiral knurled nut ensures a balanced high clamping and de-icing torque and high pulling force. This directive makes insertion much easier for the user. easy to store: All threaded knurled brass nuts are stored in a clear plastic box for easy use and protection, the threaded inserts are not messy, and you can easily find the specifications you need. Very versatile: Threaded nuts are designed for thermoplastics, such as PLA, PETG, ABS, PPS, PP. Suitable for most 3D printer parts. Package size: about 125*65*20mm Product net weight: 159 grams Note: It does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. . due to manual measurement. Please allow deviation. THANKS! becomeveryrich