Color as shown Size: 17.6 x 10.6 x 2.6 cm Weight: 200 g High Quality: High quality 3D -Use for a good finish. The inserts are stable and have a strong adhesion to the plastic, which allows for easy screwing. Counter-rotating spiral knurled nuts offer a high, balanced torque and high strength as well as high tensile force. 3D printed parts: The press-in nuts can be easily integrated into a blind or through hole using ultrasound or heat (soldering iron). < p>Sturdy and Durable: The inserts are made of high-quality brass, providing excellent corrosion resistance and excellent thermal conductivity for long-term use and easy insertion. Plastic Application: Used with a soldering iron to make 3D printed parts to connect and connect in PLA and PETG. The most suitable plastics are PLA, PETG, ABS, ASA, PPS, CPE, PP, etc. Includes Quantity: The package includes 330 pieces of knurled threaded insert nuts; Size includes: M2 M3 M4 M5.