Ancor Heat Shrink Snap Plugs feature a heat-activated adhesive built into the sleeve of the heat shrink tubing. When heated, the connector shrinks to form a watertight seal, as well as providing ultimate vibration and strain relief. Each disconnect is constructed from pure copper for maximum current flow and is tin-plated to resist corrosion from salt and moisture. A brazed seam ensures maximum strength. Tab size: .250 (6.4mm). UL listed and CSA recognized.