Swivel Wheel Casters 2-7/8"x1-1/4" Wheels 4"x3" Top Plate Caster Cart Toolbox Sold as a single unit, this quality caster is a perfect replacement for a variety of uses, from toolboxes to carts. The 2-7/8"x1-1/4" swivel wheel is made of durable polyurethane and a sturdy steel mounting plate that measures 4" x 3". The caster has a caster height of 4 inches and utilizes ball bearings for smooth swivel action. Whether you're looking to improve the mobility of your toolbox or need to replace a wheel on your cart, this caster is the perfect solution. Thanks for stopping. Please visit my slow growing store, read about me, my policies and view other items that may interest you. Also, check out my other casters wheels. **I always have money saving volume discounts on most items** David - thediscountretailer