supply of corrosion resistant zinc plated drop , corrosion resistant zinc plated drop forged steel heavy duty swivel cast ors(generally to is 7369/1983) of two deep grooved ball bearings (one for swivel actio n and other for taking thrust loads) in the swivel head for high operability and easy m aneuverability under heavy loads fitted with high quality non-marking abrasive resista nt hard rubber wheels (of shore hardness 80to 90) moulded on cast iron core equippe d with sealed ball bearings size: od of wheel:200 mm, hub length:82 mm,tread width: 75 mm, 200 x 75 swivel castors:height: 250 mm plus or minus 3 mm, load capacity: 600 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 ] ]