6x2Heavy Duty Caster Steel Cast Iron Wheel Caster, Capacity1200-5000LB

  

Roller bearing, ½ ID wrench bushing. HEAVY-DUTY CASTERS : The heavy duty casters are made of high-quality Cast Iron, bright galvanized steel wheels and yokes. The Heavy Duty Caster wheels have strong abrasion resistance, are not easy to rust, and have strong shock absorption and buffering performance, which increases the service life.