This is the Sealife 52-67mm Step-Up Ring for 52mm Thread Adapter

Features:

• Push-on design for easy to use attachment
• Compatible with other wet lenses and filters with a 67mm thread for universal use
• Requires SeaLife 52mm Adapter (sold separately)
• Constructed of black anodized aluminum in a durable construction

Expand the photographic adaptability of your DC-Series Camera. Enable the use of 67mm lenses and filters by simply screwing in the SeaLife 52-67mm Step-Up Ring into your SeaLife 52mm Thread Adapter. This Step-Up Ring is durable and constructed to keep up with even the most challenging dive conditions.