About this product VERSATILE USE: These threaded balls are ideal for replacing the magnetic ball joint system on Kossel K800 series 3D printers. They are also used in hardware, precision machinery, industrial production, and many other applications, offering unparalleled versatility. Direct Replacement: With a diameter of 10mm and a standard M4 drill thread, these threaded balls are a perfect replacement for previous steel balls, ensuring compatibility and easy installation. 【High-Quality Stainless Steel Construction】Made of high-quality stainless steel, it has high hardness, wear resistance, deformation resistance, long service life, and reliable performance. Enhanced Printer Functionality: These threaded steel balls are mainly used for punching ink cartridges in printers and are used together with screws to increase the efficiency of ink refilling and optimize printer functionality and performance. MAXIMUM STRENGTH AND DURABILITY: These threaded stainless steel balls are hardened for maximum strength and durability. They are free from cracks and defects, ensuring long-lasting performance and giving you peace of mind for all your printing needs. Product information: Product weight: 70 g Country/Region of Origin: China Size: 10 mm Color: Silver Surface treatment: Surface treatment Material: Stainless steel Power type: Power source Installation method: Installation method Quantity: Product packaging: ：‎1 Number of holes: ：‎1 Bushing height: 1 cm Measurement system: Metric Included accessories: 20 M4 threaded balls Batteries included?: No Do you need batteries?: No