strong, hygienic, smooth running : - light-weight due to light metal-alloy construction - extremely strong and sturdy - all-rubber wheels with roller bearings - anti-static and dirt resistant - coated, moulded tread and e......strong, hygienic, smooth running : - light-weight due to light metal-alloy construction - extremely strong and sturdy - all-rubber wheels with roller bearings - anti-static and dirt resistant - coated, moulded tread and embossed beading for high stability - lowerable sidewall for easy loading and unloading