A composite sheet comprising an upper layer 2 and a lower layer 3 both made of a substantially inextensible sheet which are partially bonded to each other at a large number of joints 4. The electrical connector comprises an insulative housing and a plurality of contacts received therein. The quotation also allows the customer to select several part-level parameters which are independent off the shape of the part, such as quantity of each part and surface finish. The support plate is constrained to move perpendicular to the plane of the door opening, shifting the rear wall between a closed and substantially sealed position and a closed and substantially unsealed position.