Add an expansion kit to double the capacity of a MM-160 to 320 DVD's, 440 CDs, 168 VHS or combo. Triples the capacity of the MM-72 to 232 DVDs, 500 CDs, 108 VHS or combo. Can also be attached to a MM-126 or MM-252. Approx. assembly time is 20 minutes. Warning: Expansion kits will not support your collection without being attached to a compatible multimedia rack.