Polaris Insul-Tap connectors from NSi. For connecting 2 wires sizes 250 MCM and larger. Provided with open wire entry ports on both sides of the connector, allowing access from either side. Supplied with removable access plugs to close the entry port not being utilized. Abrasion and chemical resistant. UV rated. Will not support combustion. Cold temperature rated to -45C. Dual rated for use with copper and/or aluminum cables. 600 volts. 90C. Not recommended for fine-stranded, flexible wire.