The Book of Exodus provides a remarkably precise technical description of the Ark β dimensions, materials, construction method and function. It was a chest of acacia wood, approximately 2.5 cubits long (roughly 130 cm), 1.5 cubits wide (roughly 78 cm) and 1.5 cubits high. The entire chest β inside and out β was overlaid with pure gold. It was carried on two long poles of acacia wood, also gold-overlaid, which passed through four gold rings at the base of the chest. The poles were never to be removed.
On top of the chest rested the kapporeth β translated as the "mercy seat" or "atonement cover" β a solid gold plate of identical dimensions. At each end of the mercy seat stood a golden cherub with outstretched wings, facing each other, their wings meeting above the seat to form a canopy. It was from between these two cherubim, above the mercy seat, that God declared he would speak to Moses.
Inside the Ark were three objects: the two stone tablets of the Ten Commandments (the most important), Aaron's rod that budded (the staff that miraculously flowered as a sign of priestly authority), and a golden jar of manna (the miraculous bread that sustained Israel in the desert). These three objects represented the three foundations of Israel's covenant relationship with God: the law, the priesthood and the provision.