Allpoints 26-3371 4" Swivel Stem Caster for 1 5/8" O.D. Tubing - 250 lb. Capacity

expansion stem swivel caster expands to 1-1/2" exact stem size 1.447" od wheel size 4" color beige hub, grey tread sealed bearing max load per wheel lbs. 240 tread width 1-1/4".