Made in the USA, tin plated copper ring and barrel.  The adhesive lined insulation will glue to the cable jacket providing extra protection as well as strength to your connection. The heat shrink used is premium 3M brand TMW tubing. 

Marine Grade Quality!
Top quality heat shrinkable terminals are a favorite among marine professionals. These terminals easily shrink tight to cable providing strain relief at the connection point to reduce wire strand breakage and pullout. The seal formed by the heat shrinkable jacket protects terminations from water, condensation, corrosion, and salt spray. The terminals are constructed from high-grade, fully annealed, tin plated copper with a brazed barrel seam.

These connectors are available in 20 AWG- 18 AWG, 16 AWG-14 AWG, and 12 AWG to 10 AWG. You simply select the correct wire size, screw/stud size and package quantity you'd like and add it to your cart. You can create your own assortment this way and get only what you need.

Features:
-Adhesive Lined Heat Shrink Ratio: Approx 3:1 shrink at 135C  (with no longitudinal shrinking) 
-Dielectric Strength: 900V/mil 
-Volume Resistivity: 1015 ohm-cm3