supply of corrosion resistant zinc plated drop , corrosion resistant zinc plated drop forged steel heavy duty swivelcasto rs(generally to is 7369/1983) of two deep grooved ball bearings (one forswivel action and other for taking thrust loads) in the swivel head for highoperability and easy man euverability under heavy loads fitted with high qualitynon-marking abrasive resistant hard rubber wheels (of shore hardness 80 to90)moulded on cast iron core equipped wi th sealed ball bearings. size: od ofwheel: 250 mm?2 mm, hub length: 60 mm?3 mm, tread width 53 mm?3 mm, 250 x 55swivel castors height:300 plus or minus 3 mm, load capacity: 800 kgs. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]