200kg/440lbs Load Capacity 4in Gate Wheel Heavy Duty Spring Loaded Caster

Heavy duty caster: the wheel has a maximum load capacity of 110lbs and can also withstand exposure to chemicals and solvents. Caster Dia.: 100mm/ 4in. Spring loaded design: allow gates to open and close freely by automatically adjusting height on uneven ground while eliminating gate sag.

eBay