This 4" x 1-1/4" flat tread thermoplastic rubber standard duty swivel plate caster with total lock brake is quiet, smooth rolling, easy to start and floor protective.Our 35 Series is a competitive, core lineup of 1-1/4" wide casters designed for a wide range of applications with load capacities up to 350 pounds. These casters are available in a variety of size, wheel, fastening and brake options, and features a one-year standard warranty.