The Brain Tuned Pipes are a set of 5 Pipes.The 5 Healing Tuned Pipes are based on Delta, Theta, Alpha,Beta and Fundamental .2 Brain Pipes can be heard together. The 2 parts of the brain join the 2 sounds to create a third, different sound called a binaural beat. The difference between the two frequencies must be small for the effect to occur; otherwise, the two tones will be heard separately and no beat will be perceived. When the Fundamental Brain Pipe is heard with any of the 4 Brain pipes, the difference between the two pipes creates a binaural beat which can be heard as a pulsation. Binaural beats reportedly influence the brain in more subtle ways through the entrainment of brainwaves and can be used to produce relaxation and other health benefits such as pain relief. These pipes are made from High Quality Heat Treated Aluminium Pipes producing beautiful and long lasting sound.Carefully tuned to actual frequency as mentioned.Gives Great healing effect.Dimensions of Pipe-Length – 26 to 30 inches appx,Diameter – 1 inch appx..Packing- 5 Piece Pipe with Rings on each side,1 Wood Hand Stand to hold 2 pipes at one time,1 Rubber Mallet. You can hang these Pipes on Wooden hand-stand with the help of Rings provided on sides of the Pipe.Use Rubber mallet to produce healing sound and frequency.