MP Meter Pak meter centers offer a wide range of multimetering applications. MP meter centers have UL Listed indoor rainproof NEMA Type 3R construction which meets EUSERC standards. The 9 inch meter center spacing allows for more sockets per device. This creates lighter and more compact branch enclosures. This MP accessory is an optional lug kit for MP meter pak units. This set of lugs contains lugs with two openings. Each lug opening will accept 3/0 AWG to 500 kcmil copper or aluminum wire. These lugs are UL Listed.