The single and dual wall hatch systems include a vertical opening and closing door. They are used to pass material through one area to an other such as operating theaters, sterilization rooms and cytostatic product preparation rooms. Several different configurations are available. Choose between a manual hatch or dual counterbalanced hatch with counterweights between the losing sheets or an electric hatch, powered by an electric motor. The frame in colorless aluminum with 10/10e stainless steel closing sheets and sills. The units have colorless or tinted polycarbonate hatch with airtight seals and manual handles.