At TailFin Cabinets we use only solid wood or plywood veneers in the construction. Unlike the "Chain Pet Stores, we never use MDF (Medium Density Fiberboard), an fancy name for compresses cardboard, or Partial Board (compressed wood chips) in any of our cabinets. Allowing Tain Fin Cabinets to give you a Aquarium Cabinets and Pet Furniture that will last for many years.