X Frame Piano BenchDetails of X Frame Piano BenchFeatures No more wobbles: we can't assure that all the floors are even, but we can at least make the bench stable on uneven floors; simply rotate the off center rubber feet this simple yet clever design can always keep the bench stable From 17" to 20": to ensure the most suitable and comfortable height for you, this stool has 3 heights available; easily adjust it to fit your need, and start the wonderful music time