A door is a hinged or otherwise movable panel that allows access to an enclosure, cabinet, bin, or other cavity or container. A door assembly comprises the components that work in tandem to allow the door to function properly. Doors may be hinged and swing open and closed, or they may slide within a frame. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation all other translations or rotations being prevented, and thus a hinge has one degree of freedom. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges like the elbow joint. Features. Bottom Door Hinge Kit for T72HC FGD01. Made with high quality materialSpecifications. Length 7.45. Width 4.25. Height 3.75