4 Inch Dual Spring Shock Absorbing Caster – Red Iron Core PU Wheel, Galvanized Steel Bracket, 250kg Load Capacity META TITLE: 4" KU Dual Spring Caster | Red PU Iron Core | 250kg | Galvanized META DESCRIPTION: Heavy duty 4 inch KU series dual spring shock absorbing caster with red polyurethane iron core wheel and galvanized steel bracket. 250kg load capacity, 6203 bearing. Ideal for trolleys, workbenches, and light machinery. OEM/ODM available. KEYWORDS: 4 inch dual spring