Ikelite DL 8 Inch Dome PortIkelite DL 8 Inch Dome Port IK75340 Ikelite Product Number 75340 Product Details An 8 diameter dome made of optical grade acrylic. Comparable quality to glass yet significantly lighter and easier to handle, especially at the surface of the water. Not compatible with external filters. This port can be attached directly to housings featuring the Dry Lock (DL) port system or combined with DL extensions. View the DL System Port Chart What's Included Dome