OMI-BDU-56 Practice Bombs correspond to Mk84 General Purpose bombs 2000 Lbs. These bombs have identical dimensions to live counterparts, same mass distribution, center of gravity (CoG) and moments of inertia. Suspension lugs are manufactured to MIL-STD-8591. Nominal displacement is 30″ inch NATO. Inert load is usually wet-sand or other materials.