HEAT SHRINK INSULATED BUTT CONNECTORS
Specifications:
 Waterproof
 Maximum Electrical Rating: 600 Volts
 Shrink Temperature: +150C
 Operating Temperature: −10 to +105C
 Terminal Material: Copper Tube
 Plating: Electro Tin Plated
 Insulated Material: Heat Shrinkable Tube
 
Full Spec Sheet:
https://www.nteinc.com/terminals/pdf/Butt.pdf