4 All Steel Swivel Plate Caster Wheels Heavy Duty High-Gauge Steel (3.5" No Brake) Rotate 360 degrees. Capacity: 350lbs each Plate Size: 2.5" (63mm) x 3.5" (90mm). Hole center to hole center: 1.7" (44mm) x 2.8" (72mm) Mounting hole dimensions: 0.39" (10mm). Wheel Dia.: 3.5" (89mm) Wheel Width 1.2" (30mm). Wheel Material: Iron. Overall Height: 4.5" (115mm) Includes: 4 pack 3.5" caster no brake