This Aqua Tech LP-1N 6" Dome Port is for the Nikon 16mm f/2.8 and 10.5mm f/2.8 lenses. The port is threaded and will fit the Aqua Tech ND-3, ND-7, NY-7000 and NY-3s housings. No tools are required to add or remove the port.
Acrylic front element is scratch and abrasion resistant
Front element is field replaceable
Medium diamond knurl grip for ease of installation
Piston seal o-ring on major thread base
AquaTech underwater housings released in 2012 and earlier only