This door consists of a piece of metal folded twice on each edge to provide a depth of 1 inch and a surface on the inside for a gasket. A thin rectangular brace run up the vertical center of the door. A handle to open the door is formed in one of the vertical edges. At the top and bottom of this same edge spring-loaded latches are provided to hold the door closed. On the other vertical side a stationary pin in the bottom corner and a spring-loaded pin at the upper corner serve as the hinges.