These are waterproof* heat shrink NSPA Krimpa-Seal Sealed Electrical butt connectors and are RoHS compliant.  Made in the USA.  There simply is no better product made.

• Color: Blue
• Wire Size: Blue (16-14 AWG)
• Part #: KS5-14
• Product Name: SES Krimpa-Seal, Sealed Crimp Butt Connector
• Type: Crimp and Seal with Heat Shrink Tubing
• Seam Type: Seamless

INSTRUCTIONS:

1. Strip both wires, wire length 5/16" (8mm)
2. Insert wire into barrel 
3. Crimp wire to barrel 
4. Heat tubing 

For best results: Use a heat device of at least 1000°F/538°C. Don’t overheat tubing. Don’t isolate flame. Distribute heat evenly over the tubing. 

NOTE: Crimping tool and Heat Source to reduce tubing and seal connector needed.  Butane Torch and Ratcheting Crimp tool recommended.

* There is no official UL Standard for 'waterproof' electrical connectors. Connectors would most likely fall in the IP67 range (IP - Ingress Protection, 6 - Totally protected against dust, 7 - Protected against the effects of temporary immersion between 15cm and 1m. Duration of test 30 minutes)

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