Vietnamese Tuned Gongs - 12" to 20"This listing includes the gong and a Vietnamese gong mallet. Note: Each of these tuned gongs is one of a kind. To see and hear the specific gong you're buying, choose the tuning using the drop down box above. Because of the polyphonic nature of metal percussion and sound, all instruments will show slight pitch variations when tested with a tuner. Each gong is handmade using traditional methods. Because of this, there may be hammer marks on your gong.