Scanstrut

Using marine-rated cable is a must for your boat's stereo system, but you also need watertight installation for your antenna and nav light cables. This Scanstrut cable seal is easy to install, impact-resistant, and looks great. It's designed for connectors up to 0.82" (21mm) and cables from 0.15"-0.35" (4-9mm). With a tapered bung and a closed-cell base seal, these dome-shaped seals are rugged and water-resistant. Captive nuts make assembly easy and they can be used for repeat installations. The package includes pre-drilled and blank inner seals to make every installation easier. You can choose from rugged gray or white plastic, or opt for the durable, classic look of 316 stainless steel.