ADJUSTABLE || Organ pipe with no permanent set pitch is adjustable through an entire octave (C5 (C above middle C) to C6) MULTIFUNCTIONAL || Useful in a variety of settings including a science sound laboratory, a physics or music classroom and in an orchestral setting for concert tuning - Or fun instrumental exploration! FREQUENCY || Capable of producing frequencies in a range from 521 Hz to 1024 Hz (all audible frequencies) DURABLE & STURDY || Made of high quality polished wood that is built to last and withstand multiple uses LARGE, EXTENDS || Pipe extends to 34.5" in length Organ pipe with no permanent set pitch is adjustable through an entire octave (C5 (C above middle C) to C6). Useful in a variety of settings including a science sound laboratory, a physics or music classroom and in an orchestral setting for concert tuning. Or fun instrumental exploration! Capable of producing frequencies in a range from 521 Hz to 1024 Hz (all audible frequencies). Made of high quality polished wood that is built to last and withstand multiple uses. Pipe extends to 34.5" in length.