These 200mm extra heavy duty rubber castors carrying capacity 500kgs each, combine 4 castors to make 1.5 tonne castors load capacity. Industrial heavy duty castors, overall height 240mm, 4 x M10 Bolt fixing plate, made of a heavy duty pressed steel zinc plated, housing a solid rubber wheel mounted on an aluminum centre. This swiveling heavy duty castors wheel runs on ball journal bearings, making the heavier loads easier to move. These castors are suitable for a range of heavy industrial applications where the equipment castors can carry over 1 tonne.