Low Profile Swivel Caster 3"x1-1/2" DuraFoam Wheel 4"x4-1/2" Plate Resin Wheel 3" Wheel with 4" x 4-1/2" Top Plate Plate (One) Caster 1F590-311-S Plate (04) 4" x 4-1/2" Square Top Plate (One)