Polaris Insul-Tap connectors from NSi. ISR Series connectors are suitable for connecting two wires in-line. Insulated with high dielectric strength plastisol and molded for precise fit. Supplied with removable access plugs over the hex screw. 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 use with extra-flexible cables.