SQUARE TO ROUND TRANSITION 1.5 15×15/10 SQUARE TO ROUND TRANSITION 1.5 15x15/10 SQUARE TO ROUND TRANSITION 1.5” Deep Category: Sheet Metal Fittings Sub-Category: Transitions Next Product SQUARE TO ROUND TRANSITION 1.5 15x15/12 Previous Product SQUARE TO ROUND TRANSITION 1.5 12x12/12