Ancor heat-shrink ring terminals have heat-activated adhesive built into the sleeve of the tubing. When heated, these terminals form a watertight seal for the ultimate in vibration and strain relief. Tinned for corrosion resistance, the butt connectors feature pure copper for maximum current flow and a brazed seam for maximum strength. 4.4"L x 2.7"W x 1.3"H. Provides the ultimate in vibration relief Pure copper for maximum current flow | 22-18 #10 Heat-Shrink Ring Terminal, 100-Pack