Ball Wheels Products DescriptionDC CASTERS ball wheels surface apply Bright Oxide or Bright Chrome treatment,Website:http://www.dc-casters.com, ball casters are one of most widely used wheels which are suitable for chairs, desks, sofas, tables, beds and etc. Ball Casters can move smoothly on wood floors, carpet floor, chair mats, linoleum and etc.Stem can be selected by clients requirement, Swivel type with 360 degree free moving, the main materials of wheels are rubber, with steel frame, it guarantee ball wheel work up to 30KGS with long life working period.Specification:Wheel MaterialsWheel Dia.(mm)Wheel Width(MM)Overall Height(MM)Loading Capacity(KGS)Hole Spacing(MM)Rubber&Plastic4040503038*385050603038*38