וְזֶ֛ה מַעֲשֵׂ֥ה הַמְּכוֹנָ֖ה מִסְגְּרֹ֣ת לָהֶ֑ם וּמִסְגְּרֹ֖ת בֵּ֥ין הַשְׁלַבִּֽים׃
And the work of the bases was on this manner: they had borders; and there were borders between the stays;
Read Kabbalistic (mystical) interpretations of I Kings 7:28: Zohar and classical Jewish mystical sources, free online.