What does Exodus 37:25 mean?

And he made the altar of incense of acacia wood: a cubit was the length thereof, and a cubit the breadth thereof, foursquare; and two cubits was the height thereof; the horns thereof were of one piece with it.

And he made the incense altar of shittim wood: the length of it was a cubit, and the breadth of it a cubit; it was foursquare; and two cubits was the height of it; the horns thereof were of the same.

And he made the altar of incense of acacia wood: a cubit was the length thereof, and a cubit the breadth thereof, foursquare; and two cubits was the height thereof; the horns thereof were of one piece with it.

And he made the altar for the burning of spices, using the same hard wood; it was square, a cubit long and a cubit wide and two cubits high; the horns made of the same.

And he maketh the perfume-altar of shittim wood; a cubit its length, and a cubit its breadth (square), and two cubits its height; its horns have been of the same;

He made also the alter of incense of setim wood, being a cubit on every side foursquare, and in height two cubits: from the corners of which went out horns.

And he made the altar of incense of acacia-wood; a cubit the length thereof, and a cubit the breadth thereof, square, and two cubits the height thereof: its horns were of itself.