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. Provides ultimate vibration and strain relief Pure copper construction for maximum current flow Tin-plated to resist corrosion from salt/moisture Heat Shrink Disconnects, 16-14 American Wire Gauge, Male, 3 Pack.