N120 Extension Ring 30 ~with Lock MOD The main difference

The main difference

Z240 type 4

This extension ring features a removable bayonet mount and is compatible with Nauticam Extension Ring 10 (SKU 21110)

M14 Bulkhead for electrical triggering of Ikelite strobes (X and Ground Connection Only)

plus one of the following:

N120 Extension Ring 30 ~with Lock MOD The main differenceThe Nauticam Extension Ring 30 with Lock is part of the N120 Port System and can be used to add 30mm 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. 21kg Port Opening Diameter 109mm from SN A184206 and later Port Diameter Body Material Anodized Aluminum Alloy Port Material Port Coating Port Shade Material Removable