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The Aquatica Extension to Port Locking Collar - 18469 helps extend the lens port for your Aquatica camera housing for underwater photography. The piece is compatible with all Aquatica bayonet-type extensions, and with all dome ports with a recessed hole on their back plate. It complements Aquatica housings that are equipped with a port/extension locking mechanism.
The extension ring is constructed of machined, aeronautical-grade aluminum and is designed to withstand day-in, day-out immersion in salt water. The sturdy, lightweight aluminum is anodized to military specifications. Use the provided hex key wrench to install it quickly and easily.