Polaris GLC-4DB Cu Lay-In Connector 4-14 Awg
https://nsiindustries.com/product/polaris-glc-4db-cu-lay-in-connector-4-14-awg/
Polaris grounding and bonding products provide flexible solutions for a wide range of grounding and bonding applications in the field. Use copper ground connectors for grounding or continuous loop bonding of copper wire in direct burial applications.