ALL OF MY REMAINING STOCK IS PAINTED MARINE WHITE NEW OLD STOCK ALL OF MY REMAINING STOCK IS PAINTED MARINE WHITE MONITOR PRODUCTS, INC. Bohemia, NY USA MODEL 4626 ONAN P/N 130-2954 Heat exchanger is approx 15" overall length. Larger openings are approx 1" ID. Smaller tube openings are approx 1/2" ID. Main body is 2-1/8" diameter. I assume that this unit is copper, brass or bronze. ALL OF MY REMAINING STOCK IS PAINTED MARINE WHITE I USUALLY HAVE MORE STOCK OF ALL MY ITEMS AND CAN SAVE YOU MONEY IF YOU ARE INTERESTED IN LARGER QUANTITY PURCHASES. I AM ALSO GLAD TO SELL YOU AN EXTRA SPARE IF THAT IS ALL YOU NEED. If you have further information regarding this or another item I have for sale, please feel free to let me know so that I may post it here for buyers who may not have such information. Winner pays CALCULATED shipping and handling anywhere in USA. Other countries must contact me for a postage quote. Please look at my other items in my STORE and add me to your favorites list. NOS means new old stock. These are items that are still in new and unused condition that have been on the shelf or in storage for a number of years. Most of my items are in the original factory boxes or cases. Some of these boxes show a good bit of wear and tear from storage time and handling. I try to add to my store listings all the time. Please keep in touch. Most items are sold "AS IS" with a "no return policy" unless stated otherwise in the body of the ad. Please know what you are buying and ask questions if you don't. I will answer all emails to the best of my ability. If you are not satisfied with your purchase please contact me immediately. I am not an expert concerning much of what I sell. Please send part numbers when inquiring about certain parts. ALL OF MY REMAINING STOCK IS PAINTED MARINE WHITE Sincerely, Mike ** ask me for help to search 1000's of old, obsolete and discontinued Onan part numbers. ALL OF MY REMAINING STOCK IS PAINTED MARINE WHITE Don't forget to click on SEE ALL CATEGORIES in the left hand navigation ba 11-3-21