Tenders for Supply of Heavy Duty Rigid Castors Generally To Is: 7369/1983 Fitted With Polyurethane Wheels Moulded On Cast Iron Core Equipped With Sealed Ball Bearings No: 6205Zz. Size: Od Of Wheels : 200Mm, Hub Length: 60Mm, Thread Width: 50Mm, Total Castor Height: 250Mm.