Use these larger heat shrink tubes for interconnecting heavier gauge wires. Each tube is black in color, measures 1" in length and shrinks to 1/2 the original size when heated.
Rated wire size and applications are:
CK1033-4 (1/16" inside diameter) 24 gauge, i.e., CK203-1 speaker-type wire.
CK1033-5 (3/32" inside diameter) 20 gauge, i.e., CK1008 series lead-in wire. CK1033-6 (3/16" inside diameter) 18 gauge lamp cord wire.