-. Binding : Sports -. Brand : Airmar -. Color : Black -. Feature : Black Plastic / 2inch outer diameter housing for use with Airmar P617V-DST800 DT800 DST800 DST900 ST950 235Khz-Smart-Sensors and P17 depth insert / 2.75inch (70mm) flange diameter and 3.3125inch (84mm) high from flange lip (does not include thickness of flange) to top of tube by 2inch (51mm) outer diameter / Newer style Integrated-Value tube, it has a self-sealing flap inside the tube that will seal the tube partially so water does not gush in when the insert is pulled out for maintenance or replacement. / Includes Integrated-Valve Thru-Hull Tube assembly, Rubber Washer, Hull Nut, Blanking Plug, Black and Yellow O-Rings and Installation Instructions -. Label : Airmar -. Manufacturer : Airmar -. MPN : 20-478-01 -. NumberOfItems : 1 -. PackageQuantity : 1 -. PartNumber : 20-478-01 -. ProductGroup : Sports -. ProductTypeName : SPORTING_GOODS -. Publisher : Airmar -. Studio : Airmar -. Title : Airmar 20-478-01 51mm OD Plastic Low-Profile Integrated-Valve Thru-Hull Tube with Blanking Plug