(Set of 4) Urethane Tread (Floor Protective) Shepherd "Pacer" 50mm Die-Cast Windsor Antique Body Chair Caster PPA50223 WA-U with 7/16"x7/8" Friction Ring Stem Floor-protective for wood, tile, linoleum Windsor Antique die-cast zinc body (50mm) 7/16" x 7/8" Friction Ring Stem 2-1/2" Mounting Height 75 lbs Load Capacity (each)