Color pet dog flute $ 4.26 Product name: color pet dog flute Product size: about 7.7cm long and 0.6cm diameter Product weight: about 16g each Product material: copper nickel plating How to use: Loosen the sound wave adjustment screw. While blowing in air from the air inlet, rotate the adjustment lever to the exact pitch. After the adjustment rod is screwed in, tighten the sound wave adjustment screw.