YOU NEED THEM, WE HAVE THEM! Made with resistant and long-lasting polyurethane, this 6" x 2" wheel is designed to move heavy loads in material handling environments with ease and safety. Each wheel holds up to 1000 lbs. of weight, and each set of 4 holds up to 4000 lbs., allowing you to move heavy loads easily and safely. This Polyurethane wheel is designed to keep all floors clean and tread mark-free, and its precision ball bearing helps maintain separation between moving parts for reduced friction when in motion. Our wheels are made to resist against most chemicals, oils, grease, and water in a multitude of industrial applications including mobile storage racks, mobile tool chests, platform carts, warehouse trucks, and other material handling applications.