These 4" plate casters are designed to handle heavy loads with ease. Each caster has a load capacity of 700 pounds and a total capacity of 1400 pounds for the pack of two, making them four times stronger than other casters on the market. The wheels are made of polyurethane mold on steel and have a width of 2" and a diameter of 4", while the top plate measures 4"x4-1/2" with a mounting over height of 5-5/8". These casters also feature roller bearings with hardened raceways for added strength and smooth operation. The pack includes two rigid casters with a red color finish. They are ideal for various applications such as industrial, commercial, and DIY projects, and come with a 90-day hassle-free return policy and a 100% satisfaction guarantee.