This 400 Series rigid Light Duty caster with a Zinc finish features a 3" diameter wheel made of hard rubber and Plain bearings. It's 3-13/16" tall, has a 270 lb load capacity and a n/a swivel radius. It's mounted using a top plate mount with mount dimensions: 2-15/16" x 4-1/8" Bolt Hole 1-3/4" x 2-15/16".