These insert type gray PU base fixed caster wheels are an for enhancing the stability and functionality of your office or computer chair. The wheels are easy to install—just insert the pin into the chair base, and they will lock securely in place. They are suitable for use on various floor surfaces, providing a smooth and safe experience. Features -Color:Black -Material:PU -Size:5.50X5.20X5.20cm/2.16X2.04X2.04in - material: constructed with pu material, these fixed caster wheels help to minimize floor scratches and protect your floors from damage -Effortless setup: featuring an insert rod design, these wheels are easy to install and compatible with a wide range of office and beauty chairs -Smooth and efficient movement: ideal for use in offices and beauty salons, these wheels facilitate easy movement, enhancing work efficiency in different environments -Stable seating experience: the fixed wheel design ensures that the chair remains stable during use, providing a secure and comfortable seating experience -Elegant and minimalist: with a clean and elegant design, these wheels can seamlessly blend into various office environments, improving the overall aesthetic appeal Package list: 5 x Bell Glides Replacement