Swivel castors with a black fabricated castor bracket fitted with a heavy duty ball bearing centred blue elastic wheel. These swivel casters range from 100mm-200mm and have a capacity up to 500 Kg per caster. Blue Elastic rubber wheels offer terrific rolling resistance compared to standard rubber. Elastic rubber wheels are also less likely to develop flat spots the precision ball bearing also make the wheel rotate so much easier than traditional roller bearing wheel centres. Typical application warehouse trolleys , waste bins and glass handling equipment. The black finish is not standard we decided to produce our LMH series castors in black to provide a material finish which was hard-wearing. The precision ball bearings improve rolling resistance and reduce stresses which can cause premature castor failure.