MVPower 4 Pack 4" Swivel Caster Wheels Dust Cover Rubber Heavy Duty Castors with 360 Degree Top Plate(4 inch with brake,Blue) HIGH QUALITY MATERIALMVPower swivel caster wheels are made of superior soft TPR ,PP core and iron bracket,durable and long-lasting in everyday usage,the wheels turn smoothly and silently. 4 CASTERS:Includes 4 casters ,2 normal swivel supplied and 2 braked swivel,capacity 155LB per wheel and total 620LB. OMNI-DIRECTIONAL WHEEL:4 universal wheels design makes these casters have a high performance in keeping stabilization,with 360 degree top plate and non-marking gray rubber,has the advantages of flexible movement,stable lifting,large load,easy operation and so on. USE WIDELY:This heavy duty castors be fixed to flight cases,furniture,wooden furniture,tool boxes,light machinery,suitable for use on all types of flooring such as home,shops,schools or hospitals. DIMENSION:Set of 4 new 4" (100 MM) casters tyres 25 MM wide, plate 100 MM x 80 MM.