Amazon.com: 16-14 to 12-10 Ga. Step-Down Heat
Seachoice 61411 Step Down 3-to-1 Heat Shrink Butt Connector, Marine Grade Heat-Shrinkable Butt Splices, Yellow, Pack of 10, 16-14 to 12-10 Wire Range Ancor Marine 16-14 AWG Heat Shrink Step-Down Multi-Wire Connectors (Pack of 3 Connectors)
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