Penn-Union BBLU 040D 400 MCM Copper Compression Lug

Copper Compression Lug with Sight Hole, Conductor Size: 400 MCM, Conductor Diameter: .728", 2-Hole Stud, Long Barrel, Stud Diameter: 1/2". For use with Copper Conductors in Grounding, Bonding & Direct Burial Applications.