The floor manhole cover PRO+ system consists of aluminum.  The frame is equipped with a special frost and weather seal to protect against seepage and odor leakage. The frame is fixed by casting at floor level and then the tub can be filled and inserted into the frame. Filling of the tub is possible with stone, tile, cement, resin, granite, wood and hard flooring or other materials. Areas of application: For both indoor and outdoor floor ducts. Each manhole cover comes with tightening/lifting keys and an assembly manual. The tub is attached to the frame using anchor screws. Dimensions: Customized sizes can be produced in every dimension upon enquiry.