Jiayouy Embouchure Training Device Mouthpiece Mouth Strength Trainer for Brass-wind Instrument Accessory Silver

Material: Metal. Rubber rings are dismountable, durable and long service life., Exercise lip muscle endurance.Practice mouth strength and fix mouth shape., Use both ends, pull one end, exercise lip biting force and lip muscle strength concentration., One is like holding a pencil for 10-20 seconds at a time., Applicable for Trumpet Trombones Cornet Clarinet Saxophone Horns.