This caster has a wheel diameter of 60mm and a socket diameter of 13mm. It has a unique plug-in design for installation. You only need to align the wheel axle with the reserved socket on the chair leg and gently insert it to fix it. No screws or complicated tools are required. The operation is simple and quick, which greatly saves time and labor costs and reduces the difficulty of installation. The PA material gives the wheel high strength and wear resistance, impact resistance and wear resistance, and a long service life; the black appearance is simple and elegant, dirt-resistant and easy to clean, suitable for various office, e-sports and other environments; in addition, it supports color and material customization, providing a reliable choice for customers' equipment mobility solutions.