Good day, it is required to support the rotary bearing on the aerial platform, the characteristics: 1) outster 795mm 2) inster 600mm 3) external height 79mm 4) internal height 53mm 5) of holes on the outer 20, diameter 15mm and 2pcs diameter 8mm all with thread. 6) Holes on the inner 24pcs diameter 19mm 7) of teeth 131pcs