These threaded inserts set are available in 15 sizes, including M2, M2., 5, M3, M4, M5, M6., For each specification, there is a separate compartment in the plastic box where we attach labels with detailed key data so you can easily store and find them. Both the threaded insert and flux sleeve of the soldering iron are made of high quality brass, which is very hard, wear-resistant, antioxidant, corrosion resistant and durable. 300Pcs M2-M6 Brass Knurled Nut Threaded Heat Set Inserts for Plastic 3D Printing Parts Nut tool Kit Bushings Accessory for Nut 5.0 1 Review ౹ 11 sold Size: M2 M2 Color: 1 boxs Customer Reviews (1) Specifications Description Store More to love Product attributes: Material: copper., Package weight: 186 g / 6., 5 oz., Package size: 17 × 10 × 2 cm / 6., 6 × 3., 9 × 0., 7 inches. If the insert nut is no longer needed, simply carefully remove the pressure part and the insert nut can be reused. 300x M2-M6 Brass Knurled Nut Threaded Heat Resistant Set 10 PACK M2.5 L3 KNURLED BRASS THREADED INSERTS - Xtrude 3D | 3D Printers, Filament and Parts Package includes: ● 300 x threaded inserts. Friendly tips: All sizes are measured by hand and there may be a small difference. The non-slip external thread can increase friction when screwing, making installation safer. Threaded Inserts For Plastic HANGLIFE Heat-Set Threaded Inserts, M3 Heat Set Insert For 3D Printing Components And Plastic Parts - Brass Metric Knurled Nuts (100 Pieces Knurled Inserts Suitable for injection molding, PCB assembly, electronics and most plastic parts.