This 100 Series rigid Light Duty caster with a Zinc finish features a 3" diameter wheel made of soft rubber and Plain bearings. It's 3-13/16" tall, has a 175 lb load capacity and a n/a swivel radius. It's mounted using a top plate mount with mount dimensions: 2-1/2" x 4-15/16" Bolt Hole 1-3/16" x 4".