General description These 5pcs Office Chair Casters are designed for easy replacement of your office chair wheels. With a standard stem size and a smooth rolling mechanism, they are perfect for enhancing mobility while protecting your floors. Technical specifications Stem size: 11mm diameter x 20mm length Wheel diameter: 48mm Installation Easy installation without tools or hardware Simply pull out your current casters and push the new wheels into the socket Usage Suitable for most common types of office chairs and children's chairs Features 360° rotation for easy movement Shock-resistant material protects floors from wear and tear Quiet operation, ensuring no disturbance while working