Applicable scenario: Musical instrument Product Category: Accessories Color: Silver Material: Brass Packing: OPP bag Gross weight:34.1g Packing list: small mouth exercises Selling Point: Brass making, good wear resistance. Nickel plating on the surface increases the service life of the product. Enhance the ability to resist erosion, make the surface of the object bright and beautiful. Small and delicate. You can practice using it anytime. Usage: According to the principle of mouth and breath forward, lip concentration, and closing wind, avoid pulling out of the mouth of the lips, practice gums, teeth close, teeth aligned, and lips parallel, and correct mouth shape and breath while practicing mouth strength. Practice mouth strength at the same time, fixed mouth type. Use both sides and pull one end to exercise the lip bite and lip muscle strength concentration. One's like a pencil, 10 to 20 seconds at a time. Exercise lips muscle endurance