NSI Polaris™ IPLD500-4 IPLD Double Sided Entry Insulated Multi-Tap Connector, 4 AWG to 500 kcmil Aluminum/Copper Conductor, Plastisol | State Electric
NSI Polaris Insul-Tap Connector, for Two Wires and in-Line Splicer/Reducer, ISR Series, 250-6 AWG Wire Range, 4.00" x 1.19" x 1.90", Pack of 4: Screw Terminals: Amazon.com: Industrial & Scientific
NSI IT-500 Double Sided Insulated Multi-Cable Tap Connector 500 MCM-4 AWG Black Polaris: Amazon.com: Industrial & Scientific
NSI Industries Nsi Industries 106850 Polaris It Series Insulated Connector 4-14 Awg at Lowes.com