New old stock boat vent.  Nicson marine part with the numbers "166".  Surface is so shiny it is like a mirror.  Weight and measurements in pictures.  Selling two total aka a pair.  Metal is slightly magnetic, and the vent appears to have been built rock solid.  Tubing included, if buyer does not want the tubing let me know.  If that's the case i can fit the vents in a smaller box.  Feel free to ask questions regarding the item or shipping requests.  Last set that i have to sell, last 4 pictures are for current listing.