UP-98137 20-18 to 16-14 AWG CS Multi-Wire Heat Shrink Connector – Clear w/ Red Dash, 5 Pcs.

4x Adhesive on inside melts down to protect wires from corrosionConnects two wires of smallest listed AWG to one of the same gauge on the opposite end.For instance on the Blue Dash version, you can put two 14-16 GA wires on the 'yellow' end and one 14-16 G