The Nauticam Extension Ring 40 with Lock is part of the N120 Port System and can be used to add 40mm effective length to an N120 Port setup.
See Port Chart for more details on choosing the correct extension and port.
TECHNICAL SPECIFICATIONS
| Depth Rating | 150m |
| Port System | N120 |
| Weight | 0.24kg |
| Port Opening Diameter | 109mm from SN A048435 and later |
| Port Diameter | |
| Body Material | Anodized Aluminum Alloy |
| Port Material | |
| Port Coating | |
| Port Shade Material | |
| Removable Port Shade | |
| Spare O-ring | 90140 |