This 400 Series swivel Light Duty caster with a Zinc finish features a 5" diameter wheel made of dyna-tred tpr and Precision bearings. It's 6-1/8" tall, has a 300 lb load capacity and a 3-15/16" swivel radius. It's mounted using a top plate mount with mount dimensions: 2-7/8" x 3-5/8" Bolt Hole 1-3/4" x 2-7/8"to 3".