Not to sound like an azz but he just told you where. What you need I think but you not being specific makes it where we have to read your mind, you need the pitot and the rubber tubing that goes from the pitot to the back of the speedometer. The pitot is the mount the rubber tubing slides onto it and then runs all the way up to the back of the speedometer. I see a pitot on iboats but not the tubing. Or try your local marine dealer.