20Pcs Threaded Steel Ball,10mm Replacement Chromium Balls M4 for Kossel 3d Printer Magnetic Ball Joint System

ABRASION RESISTANCE: The threaded steel ball rod ends are made of bearing grade stainless steel, which is high hardness, abrasion resistance and deformation resistance. It is durable and has a long service life. COMPATIBILITY: These drilled threaded steel balls are highly adaptable and will typically fit into the Kossel 3D printer magnetic ball joint system. This product is stable, safe and reliable for use. PACKING LIST: This production disc set contains a total of 20 M4 threaded balls, which have a diameter of 10 mm/0.4 inch and a hole diameter of 3.8 mm/0.15 inch (approx. M4), please pick according to the size you need. MAIN USES: These threaded steel ball ends are mainly used to fill printers with ink and to press cartridges in conjunction with screws, as well as being used as accessories for other industrial products. MAXIMUM STRENGTH: All stainless steels are hardened for maximum strength and longer life. These stainless steels are free of cracks and blemishes and are dedicated to giving you a great experience.