This 4" x 1-1/4" polypropylene standard duty swivel plate caster with tread brake is ideal for wash-down and wet environments. Polypropylene wheels are non-marking and non-reactive.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.