Cross Reference 1 KINGS 7:30 AND EVERY BASE HAD FOUR BRASEN WHEELS AND PLATES OF BRASS AND THE FOUR CORNERS THEREOF HAD UNDERSETTERS UNDER THE LAVER WERE UNDERSETTERS MOLTEN AT THE SIDE OF EVERY ADDITION

{1 Kings 7:30} And every 259 base 4350 had four 702 brasen 5178 wheels, 212 and plates 5633 of brass: 5178 and the four 702 corners 6471 thereof had undersetters: 3802 under x4480 x8478 the laver 3595 [were] undersetters 3802 molten, 3332 z8803 at the side 5676 x4480 of every 376 addition. 3914

wheels:
"Now as I beheldª ° the living creatures,ª behold¹ oneª wheelª upon the earthª byª the living creatures,ª with his fourª faces.ª ... When those went,² °¹ [these] went;² °¹ and when those stood,ª ° [these] stood;ª ° and when those were lifted upª ° from¹ ¹ the earth,ª the wheelsª were lifted upª ° over againstª them: for¹ the spiritª of the living creatureª [was] in the wheels.ª" {Ezk 1:15-21} + "[I heard] also the noiseª of the wingsª of the living creaturesª that touchedª ° oneª another,ª and the noiseª of the wheelsª over againstª them, and a noiseª of a greatª rushing.ª" {Ezk 3:13} + "And [as for] their appearances,ª they fourª had oneª likeness,ª as if¹ a wheelª had been¹ in the midstª of a wheel.ª ... As for the wheels,ª it was criedª ° unto them in my hearing,ª O wheel.ª" {Ezk 10:10-13}

had undersetters:
It is probable that these undersetters were so many strong legs, somewhat shorter than the wheels, and were intended to prevent the laver from tilting, or falling, in case of any accident.