The Olympic J5WT-4 Work Table Stem/Brake Caster Kit features four durable 5" diameter casters designed for optimal mobility and stability. Each caster has a 1-1/4" face and is equipped with a reliable brake for secure positioning. The non-marking, flat high modulus rubber tread ensures smooth movement while protecting your floors. With a robust capacity of 300 lbs per caster, this kit is ideal for heavy-duty applications. It fits standard 1-5/8" or 1-1/2" ID tubing and is NSF certified, making it suitable for various work environments.