Ancor Heat Shrink Assorted Butt Connectors 10 Pack Ancor Heat Shrink Butt Connectors feature heat-activated adhesive built into the sleeve of the heat shrink tubing. When heated, these connectors form a water-tight seal and the ultimate vibration and stain relief. Sold as a pack of 10. Features Tinned for corrosion resistance Pure copper for maximum current flow Brazed seam for maximum strength UL listed and CSA recognized Sold as pack of 10 California Residents WARNING Cancer and Reproductive H