The Endurance Dual Wheel Caster Series is an answer to prayers from many of our customers. Endurance’s forged steel construction is perfect for applications that require 24/7 operations and/or are too critical to fail. With 3 ½-inch, 4-inch and 5-inch diameter options, and the incredibly popular 2-1/2 inch x 3-5/8 inch mounting plate, the Endurance Series is offered in both steel and stainless-steel versions.