The Krowne Metal 28-101S Plate Caster set includes four swivel casters designed for optimal mobility and stability. Each caster features a 3-inch diameter and a robust 4" x 4" mounting plate, supporting a load capacity of up to 220 lbs per caster. The grease-resistant construction ensures durability in demanding environments, while the integrated brake provides secure positioning when needed. These casters raise the height of your equipment by 4 inches, making them ideal for various applications.