These casters are designed to protect your floors while providing excellent mobility and stability for your chair. Simply attach the wheels to the base of your chair or furniture, and enjoy the convenience of easy movement and enhanced stability. Features -Color:Black -Material:TPR, metal -Size:7.00X5.50X5.00cm/2.75X2.16X1.97in - Wheel diameter: 50mm - Wheel width: 60mm - Maximum load bearing: 45-50kg - Mounting height: 55mm - Screw rod diameter: 11mm - Rod height: 22mm -Silent functionality: designed to operate quietly, these caster wheels ensuing silent environment, ideal for any setting -Wide compatibility: suitable for office chairs, gaming chairs, and computer chairs, providing a versatile solution for various needs -Effortless movement: swivel capability allows for effortless movement in any direction, enhancing chair mobility -Easy to attach: these caster wheels are easy to install, making it convenient to replace your chair's wheels -Sturdy: built from sturdy materials, these wheels and can endure long-term use without damage Package list: 5 x office chair swivel casters