Tap connections and in-line splice/reductions are made quickly and easily with the Unitap line of connectors. UL486B Listed. Dual-rated AL9CU for any stranded copper or stranded aluminum applications. 600 Volt, 90 degrees C. Clear Plastisol. Allows visual confirmation that conductor is properly inserted. Inhibits moisture and contaminants from entering the contact area. Reduces number of connectors carried in inventory. 1/8-inches Hex size.