Krowne 1-1/4" Square Post Shelving Caster, locking wheels, 5" diameter, 220 lbs per caster load capacity, grease resistant, raises height of equipment 6", fits Cambro Camshelving® plastic shelving (set of 4)‌​‍​​‌‌​​‍​​‌​​​‍​‌​​‌​‍​​‌‌‌​​‍​​‌​​‌‍​​‌‌‌‌‍​​‌‌​‌‌‍​‌​​‌​‍​​‌‌​‌‌‍​​‌‌​‌‌‍​​‌‌‌​‍​​‌‌‌​‍​‌​​‌​‍​​‌‌‌‌​‍​​‌‌​‌‍​​‌‌​​‍​​‌‌‌‌​‍​‌​​‌​‍​​‌‌‌‌‍​​‌‌‌‌‍​​‌‌​​‍​​‌‌‌‌‍​​‌​‌‌‍​​​‌‌‌‍​​‌‌​​‍​​‌​‌‌‍​​‌‌‌‌​‍​​​‌‌‌‍​​‌‌‌​​‍​​​‌‌​