1 off wall mounted double stack transfer hatch with 2 sets of mechanically interlocked hinged dorrs. Constructed from white polypropylene with a clear polycarbonate windows fitted complete with rubber door seals. Internal dimensions are 600 wide x 600 high x 650 deep. External dimensions are 720 wide x 1440 high x 650 deep. Unit will be supplied complete with 2 off full frame bexel/serals for finishing to the wall.