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.