The inserts are stable and adhere strongly to the plastic allowing easy screwing. Opposite spiral knurled nuts provide high, balanced torque and tightness, as well as high traction. Quality: Quality 3D insert allowing a good finish. Inserts are made from the highest quality brass, providing excellent corrosion resistance and thermal conductivity for long term use and easy insertion. Used with a soldering iron to bring together and join 3D printed parts in PLA and PETG.The most suitable plastics are PLA, PETG, ABS, ASA, PPS, CPE, PP, etc. Insert Fileté Filetage Femelle M2 M3 M4 M5  Douilles Filetées en Laiton pour  impression 3d  330PcsSpécifications:Quantité: 330 piècesCouleur: laitonLe forfait comprend:30x M2: 4x 3.5mm,30x M2: 6x 3.5 mm,30x M2: 8x 3.5 mm 20x M2: 10x 3.5mm30x M3: 4x5mm,30x M3: 6x5 mm,20x M3: 8x5 mm,20x M3:10x5 mm 30x M4: 4x6mm,20x M4: 6x6 mm,20x M4: 8x6 mm,15x M4: 10x6mm15x M5: 8x7mm,10x M5: 10x7mm,10x M5: 6x7mm