4 Pack 4 Inch Caster Wheels Swivel Plate on Red Polyurethane Wheels Rotate 360 degrees. Smooth & Silent & Sturdy. HEAVY DUTY Capacity: 300lbs each. Plate Size: , 2.55" (65mm) x 3.7" (94mm) Hole center to hole center:1.77" (45mm) x 2.95" (75mm). Mounting hole dimensions: 0.32" (8.3mm) x 0.46" (11.9mm) Wheel Dia.: 4" (101mm). Wheel Width: 1.25" (32mm). Wheel Material: Polyurethane. Overall Height: 5" (127mm) Color: Red. Ball bearings: Double ball bearings. Includes: 4 caster no brake