Replacement flute headjoint cork with copper plug and crown designed for flute headjoints to restore seal, response, and tuning stability. Key benefits Restores airtight seal and stable embouchure: replaces worn or compressed cork to prevent air leaks and restore consistent airflow and response. Durable copper plug with crown: the metal plug provides a secure anchor inside the headjoint and supports even pressure distribution for longer lasting performance. Precise fit for most standard flute headjoints: engineered to fit typical concert flute headjoints without extensive modification, making repairs simple and reliable. Easy installation and adjustment: can be trimmed and positioned by a qualified repairer or technician to achieve correct cork height and placement for tuning. Protects instrument and tone quality: replacing a degraded cork improves tuning accuracy, tone projection, and response across registers. Product attributes Function: headjoint cork replacement and sealing plug to maintain air column and embouchure placement. Compatibility: intended for use with common transverse flutes and most standard flute headjoints; suitable for or maintenance work. Material: natural cork body combined with a copper plug and a crown piece for secure fitting. Performance: designed to reduce air leakage, stabilize headjoint tuning, and enhance articulation and response. Typical use scenarios workshop: technicians use this cork and plug assembly to a flattened or damaged headjoint cork and restore proper tuning and response. Student instrument maintenance: music teachers or students an old cork to improve playability and keep a school or practice instrument in reliable condition. Instrument refurbishment: luthiers and shops installing a cork and copper plug during a full headjoint overhaul to ensure a consistent embouchure reference and better tone production. Notes on installation Installation should be performed or supervised by a qualified repairer familiar with setting cork height for accurate tuning. Trimming and alignment may be required to match specific headjoint specifications and desired tuning adjustments. This headjoint cork with copper plug and crown provides a practical, durable solution for maintaining flute playability and tuning stability.