Pacer Step-Down Butt Splices w/Blue Heat Shrink - 22-18 AWG to 16-14 AWG - 100 PackStep Down Butt Splices with Blue Heat Shrink 22 18 AWG to 16 14 AWG 100 Pack In an electrical system, there may be times when connecting one wire to multiple wires is needed. Alternatively, there may be times when connecting two different gauge wires is needed. In situations like this, users would use step down butt splices with colored heat shrink. Heat shrink butt splices protect against the elements in the most challenging of environments. They