Adhesive lined heat shrink sleeve, shrinks to provide environmentally sealed connection which resists water, oil, chemicals and acids. Provides vibration and strain relief and helps eliminate wire pull out. Nylon insulator won't split or crack like vinyl (PVC) insulated connectors, is resistant to ultra-violet radiation. Brazed seam grips wire in barrel to help prevent wire pull-out and provides for uniform crimping pressure across connection Tinned copper barrel resists corrosion from moisture and salt found in the marine environment.