'Piece' in the Bible

Under its brim were gourds encircling it ten to a cubit, completely surrounding the Sea; the gourds were in two rows, cast in one piece with it.

Underneath the borders were four wheels, and the axles of the wheels were on the stand. And the height of a wheel was a cubit and a half.

On the top of the stand there was a circular piece half a cubit high, and on the top of the stand its supports and borders were part of it.