N120 Extension Ring 35 ~with LockThe N120 Extension Ring 35 with Lock is part of the N120 Port System and can be used to add 35mm effective length to an N120 Port setup. This extension ring supports the use of ports extension rings that have removable bayonet mounts. See Port Chart for more details on choosing the correct extension and port. Technical Specifications Depth Rating 100m Port System N120 Weight 0. 36kg Port Opening Diameter 98mm Port Diameter Body Material Anodized