This 400 Series swivel Light Duty caster with a Zinc finish features a 3" diameter wheel made of urethane and Precision bearings. It's 3-13/16" tall, has a 225 lb load capacity and a 2-3/4" swivel radius. It's mounted using a top plate mount with mount dimensions: 2-1/2" x 3-5/8" Bolt Hole 1-3/4" x 2-7/8"to 3".