Allpoints 1201063 Caster, Stem, 4", W/Brk, Gry

material plastic hub polyurethane wheel width 5/16" axle bolt 15/16" wheel caster brake y load capacity 600 lb per set of 4 load height 4 3/4" wheel diameter 4" outer diameter 1 1/2" tubing caster type stem swivel.