Copper One-Hole Compression Lug, Standard Barrel, 1 AWG Copper Conductor, 3/8 inch Bolt Size, Tin-Plated High-Conductivity Copper Construction, with Inspection (Peep) Hole, Die Code 37, Green Color Code, rated up to 35 kV. Designed for reliable permanent compression connections in power distribution, industrial electrical, grounding, and commercial applications.