General description Replace your chair casters with the Office Chair Bells for enhanced stability. This pack of 5 replacement end caps allows you to convert your swivel office chair into a fixed chair without losing height, making it ideal for both office and gaming chairs. Technical specifications Outer diameter: 50 mm Inner diameter: 10 mm Maximum weight for 5 wheels: 200 kg Spindle length: 22 mm Protection The fixed end caps provide rubber protection for all types of floors. Designed for use on hard surfaces such as parquet, linoleum, laminate, and tiles. Installation No tools are required for assembly. Simply remove your seat casters and attach the bells.