Diameter: 29 mm (34 mm). Rod Length: 70mm Material: brass; aluminum; plastic. To your attention a sealing device, which is a cup with two mounting holes and a sliding cylindrical rod. It is used for sealing doors, lockers, rooms only if the door does not protrude beyond the doorway. When the door is opened, the rod violates the integrity of the impression made on plasticine using a metal stamp.