The AquaTech LP-NWZ Flat Port is primarily designed for the Nikon wide angle 17-35mm zoom lens. The AquaTech LP-NWZ Waterhousing Lens Port comes with a threaded system, which can be interchanged with all present model sport housings of AquaTech. You will not need any kind of tools for removing or attaching the ports.The port body is made from cast aluminum tube to offer durable performanceThe AquaTech Underwater Housing’s front element is made from replaceable acrylic material. Hence it is abrasion and scratch resistantThe ring gear and ball drive zoom control of the AquaTech LP-NWZ Flat Port enables you to access the complete focal length of  the lens without vignettingIts textured grip makes installation very easy for youThis lens port weighs only 9.3 oz and is not more than 107mm long when measured with the lens filter