Please if you can supply qty 500off 12 seg commutator with slotRiser diameter = 30.25 mmBrush track diameter = 27.5 mmBore diameter = 8.7 mmTotal copper length = 20.7 mmRiser length = 5.00 mmBrush track length = 15.7 mmSlot width = 0.85 mmSlot depth = 2.00 mmNumber segments = 12