NilfiskCFM 100 litre painted separator complete with lid on caster wheels.
This is put between the vacuum cleaner unit and where the bulky, or fine particled debris, or product is being picked from, to prevent the vacuum filter becoming clogged, or when vacuuming up moderate amounts of wet debris, it may be deposited in here before it gets to the vacuum cleaner.
Also available as 50 litre version similar to that shown in the picture, but half the height.
As freight is FREE!! on this item, maximise the saving on postage and buy some of the other related parts below, such as dustbags the filters a new hose or a new floor tool or other nozzles and accessory for your industrial vacuum cleaner.