Swivel castor made from a fabricated steel castor bracket fitted with cast polyurethane on cast iron core fitted with 2 precision ball bearings.. These swivel casters range from 100mm - 200mm and have a capacity up to 500 Kg per caster. Polyurethane on cast iron centres are quiet , provide a soft cushioned ride and will not damage floors and can be used in food and pharmaceutical applications. Cast Polyurethane was once so expensive few could or would buy even though its was the correct choice this prevented many from using. Typical applications for our PTBJ series castors are warehouse , automotive and where heavy duty castors are required. Cast Polyurethane was once so expensive few could or would buy even though its was the correct choice this prevented many from using. Our aim has to always offer value for money our polyurethane is now become much more popular and the cost have come down. We recommend all food companies to use this very versatile castor you want be disappointed. Our polyurethane tyred wheels are manufactured using only the highest quality materials ensuring product satisfaction. Polyurethane tyres provides a very smooth and cushioned ride and will help reduce any likely vibration and limit bracket fatigue.