Made of bamboo, 8 hole , transverse, Keys vary, but are pretty accurate in terms of A440 for any given pitch. Membrane tissue over the hole closer to the blow hole, for a great sound, buy Ass's glue at a herb store wet hole closer to blow hole crumble tissue straighten out and put over hole.membrane applies with e jiao (donkey hide glue), found in chinese medicine and online $10.95
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