These twin wheel chrome casters have a load capacity of 300 lbs per set of four. They have heavy duty 2 inch (D) wheels that are made of black plastic that will move easily on your flooring. Twin wheel chrome casters have strong 5/8 inch (H) 5/16 inch (D) 18 thread per inch stems. They are perfect when added to your clothing racks for moveable displays. They are easily attached and are great for many different style garment stands.