Seachoice Watertight Cable Thru Hull Fitting

There are two different sizes of these that take different size holes. I had my transducer installed already so the hole was already drilled and this one fit the hole. I sealed the cable with marine caulking after installing. The design allows the cable to bend without a tight crease. The only problem I had is that since the cable was already run, I had to cut the plastic nut with d@ykes and spread it to get the cable inside it. It still threaded on o k and got pretty tight.