Beware of online cheap offers of Extinguishers, Fire Protection is one of the most important issues with regard to the work place, building need to be properly assessed as to the risks involved, Extinguishers supplied need to be commissioned into service and placed in their correct positions with all appropriate signage. Buying direct Extinguishers may not be commissioned or serviced; they may not be the correct medium for particular Fire Risk and could invalidate your insurance cover.