The door leaf consists of a polyethylene (HMPE 500) plate of 15 mm thick. We add an oval window of 385 mm by 585 mmh. This window is a polycarbonate window which we directly add to the polyethylene plate to guarantee one smooth, integrated surface. On the side where the hinges are added, we attach an anthracite (RAL 7016) reinforcement. On the other side we add black rubber finger protection.