General description The Office Chair Casters 5 Pack features an upgraded double wheel design that ensures smooth and quiet movement while protecting your floors from scratches. With a heavy-duty construction, these casters are designed to support up to 250 kg, making them a reliable choice for any office chair. Technical specifications Diameter: 50 mm Pin size: 11 mm diameter x 22 mm length (7/8") Weight capacity: 250 kg Installation Easy installation without tools or hardware. Simply remove the old casters and slide the new ones into position. Usage Compatible with 99% of office chairs. Designed for smooth, quiet rolling on various floor surfaces.