An arrangement for removing gas, smoke, solid particles and the like in connection with welding and/or cutting consisting of two parts which can be easily latched together, namely an outer housing and an inner part. The outer housing comprises a unit for the suction of air-borne pollutants, and also a duct arranged with small opening for cooling fluid to escape for cooling both the outer housing and the inner part. A pyramidal shaped structure within the housing for assisting the reduction of the speed and energy of the spark particles formed during welding or cutting.