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. Four meter socket configurations available with options such as ring or ringless, 4 and 5 jaw, horn or lever, and jaw release. This MP meter center accessory is a semi flush flange kit for 125 A 3 and 4 position meter centers. Used with MP33125, MP44125, MPH33125, MPH44125, MPR33125 or MPR44125.