Rashi: This is a wall around the hole in the middle of the Mechonah, like I explained above (verse 31). Under this, for a height of one Amah, the Mechonah was square.

Rashi: These are "Sarnei Nechoshes" (verse 30). ¹ Gra - they are called Yados, for they were above, and were short like hands. They helped to support the Kiyor. Malbim - they were on top of the Mechonah, which was covered, except for the opening to receive the Kiyor.

Rashi: The bottom Misgeros were molten with it; they were not attached afterwards. Gra - all the pillars that support the Kiyor are called Misgeros; all were molten with it. Malbim - also the Yados were molten with it.