#5510.81 Dome Port and #5510.83 Extended Dome Port produced before August 15, 2006 have an operating depth limit of 150 feet (45m).

New specifications for the #5510.16 and #5510.24 body design used in these ports starting August 15, 2006 provides a safe operating depth of 200 feet (60m). These new bodies are marked "RATED 200 FT (60m)" or have the body model number near the smaller port seal o-ring (older bodies have no such marking).

We will exchange early bodies for the revised version if sent to Ikelite without the #5510.40 Dome assembly. #5510.82 Super Wide Port with its #5510.10 body is NOT subject to this limitation or change.