10 MM OR 11 MM - Our PVC-coated casters are available in two sizes. Therefore, determine the required spindle size to the nearest millimeter. 90% require 11 mm, except, for example, for office chairs from Swedish furniture manufacturers. STRONG BRAKING - To prevent the chair from rolling unintentionally, the chair with hard floor casters only rolls under load. Perfect for desks, tables, and gaming. MAXIMUM PROTECTION - With the 50 mm office chair casters, you can move flexibly and protect surfaces such as parquet, laminate, tiles, carpet, or stone floors thanks to the smooth PVC coating. TOP QUALITY - The two wheels on the steel axle ensure smooth rolling. The robust plastic housing sits on top and, together with the bar, ensures a stable connection to your chair.