3M Scotchlok Copper Compression Lugs are one-piece, seamless copper and are designed to cover a wide range of conductor sizes. They are available in one-hole, standard-barrel and one-hole and two-hole long-barrel versions:  Scotchlok lug 30000 Series are one-hole, standard-barrel length lugs and are designed to cover conductor sizes from 6 AWG through 4/0 AWG.  The Scotchlok lug 31000 Series consists of: o one-hole, long-barrel length lugs designed to cover conductor sizes from 2 AWG through 600 kcmil (MCM) and, o two-hole, long-barrel length lugs designed to cover conductor sizes from 6 AWG through 1000 kcmil (MCM) They are designed to terminate copper conductors. Each lug is electro-tin plated to resist electrolytic corrosion. The lugs are installed using standard industry tooling. Chamfered ends ensure simplicity and ease of conductor insertion.