Quality Australian Made H Series Heavy Duty Castors are able to carry up to 600 kg each, the range of heavy duty H Series castors are available in 150 and 200 mm sizes, and in a wide range of wheel types. Easy process to order: 1> Pick wheel type - Rubber. Polyurethane, Hard Nylon or Cast Iron 2> Pick Fork Type - Fixed, Swivel, Swivel with Brake or Swivel and Position Lock 3> Pick plate base type - North American (NA) or International (ISO) Scroll Down to see the many options / combinations.