plastic and metal construction for long term use. Smooth surface will not scratch hands and provides comfortable handling. Key benefits Durable and lightweight: Metal reinforcement with plastic provides strength while keeping weight low for easy transport. Comfortable finish: Smooth surface reduces hand fatigue and prevents scratching during extended use. Precise airflow control: Seven holes on the front and one hole on the back allow accurate regulation of airflow for consistent tone. Warm, melodious sound: Hole layout and airflow design support an accurate, warm, and musical tone. Simple to use: Intuitive hole arrangement makes it easy to control dynamics and articulation. Function and compatibility Designed to control airflow and shape sound for wind instrument applications or similar audio devices where a precise air path is required. Materials and layout suit repeated use in practice, instruction, and performance settings. Practical use scenarios Home practice: Use during daily practice sessions to develop consistent tone and control. Teaching and classroom use: Clear hole layout helps instructors demonstrate fingering and airflow techniques. Small performances and rehearsals: Lightweight construction makes the item easy to carry for rehearsals and informal performances. Materials and specifications Materials: plastic and metal. Surface finish: Smooth, nonabrasive. Hole configuration: Front side 7 holes, back side 1 hole. Performance: Facilitates easy airflow control for accurate, melodious, warm sound. This product offers a practical, long lasting solution for players and instructors who need reliable airflow control and a comfortable handling experience.