DescriptionThis item is a set of synchronous wheel, manufactured with premiumaluminium alloy material, so that it can serve you for many years. Highquality material can ensure its durability and practicability. It isperfect for 3d printers use.Features- Color: As shown. - Material: Aluminium alloy. - Size: About 5.00X5.00X2.50cm/ 1.97X1.97X0.98inch. - 3D printer replacement accessories, suitable for most models of printers. - With fine workmanship, not easy to wear and tear, very practical in use. - Simple and generous product appearance design. - and low price, high cost performance. - Though it is simple in design, it's so practical when you use it.