Durable Copper Cork Plug 55x19mm

Measuring approximately 55 × 19 mm and weighing around 24 g, this flute headjoint cork plug is built using copper, metal, and natural cork — materials selected for durability and acoustic fidelity. Its compact cylindrical form includes a permanently attached crown for reliable retention inside the headjoint. Used by repair technicians to restore proper cork placement, it supports accurate voicing and response across all registers. Compatible with standard Boehm-system flutes, it serves both maintenance and calibration purposes — especially after headjoint cleaning, dent removal, or routine servicing.